Re: Is their any tutorial for optimizing tomcat performance?
first we need to know what kind of hardware you're using. there are articles on tomcat's resource page. http://jakarta.apache.org/tomcat/resources.html tuning the performance should take into consideration what kind of load you expect, so if you don't have those written down as requirements, I would get that information first. peter On Mon, 8 Nov 2004 10:19:46 +0530, Amit Gupta [EMAIL PROTECTED] wrote: Hi, Is their any tutorial for optimizing tomcat performance? I run it on 64 MB RAM and 64 SWAP Space. is it Ok or not? Amit Gupta Email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Is their any tutorial for optimizing tomcat performance?
Hi, Is their any tutorial for optimizing tomcat performance? I run it on 64 MB RAM and 64 SWAP Space. is it Ok or not? Amit Gupta Email: [EMAIL PROTECTED]
RE: tomcat performance/GC with JVMStat's visualgc
Its quite easy. Download jvmstat and add the bin directory (bat on windows) to your path. Run jvmps in a command window to find out the process id of your tomcat, it is the one with Bootstrap in it. Then run visualgc with the process id. You can also do this remotely by supplying a machine name to jvmps and visualgc. Read the instructions for jvmstat and all will become clear. -Original Message- From: Rajesh [mailto:[EMAIL PROTECTED] Sent: 13 August 2004 06:08 To: [EMAIL PROTECTED] Subject: tomcat performance/GC with JVMStat's visualgc Hai all how to check Tomcat's garbage collectioin with JVMStat's visualgc Rajesh - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Any opinions expressed in this E-mail may be those of the individual and not necessarily the company. This E-mail and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this E-mail in error and that any use or copying is strictly prohibited. If you have received this E-mail in error please notify the beCogent postmaster at [EMAIL PROTECTED] Unless expressly stated, opinions in this email are those of the individual sender and not beCogent Ltd. You must take full responsibility for virus checking this email and any attachments. Please note that the content of this email or any of its attachments may contain data that falls within the scope of the Data Protection Acts and that you must ensure that any handling or processing of such data by you is fully compliant with the terms and provisions of the Data Protection Act 1984 and 1998. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: tomcat performance/GC with JVMStat's visualgc
JProbe is also a nice tool for tracking JVM behaviour. You may want to look into it. Nandish Rudra ECI Conference Call Services, LLC -Original Message- From: Rajesh [mailto:[EMAIL PROTECTED] Sent: Friday, August 13, 2004 1:08 AM To: [EMAIL PROTECTED] Subject: tomcat performance/GC with JVMStat's visualgc Hai all how to check Tomcat's garbage collectioin with JVMStat's visualgc Rajesh - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: tomcat performance/GC with JVMStat's visualgc
you can always try JFluid, which is an experimental VM from sun that has some cool profiling features. peter On Fri, 13 Aug 2004 09:05:51 -0400, Nandish Rudra [EMAIL PROTECTED] wrote: JProbe is also a nice tool for tracking JVM behaviour. You may want to look into it. Nandish Rudra ECI Conference Call Services, LLC -Original Message- From: Rajesh [mailto:[EMAIL PROTECTED] Sent: Friday, August 13, 2004 1:08 AM To: [EMAIL PROTECTED] Subject: tomcat performance/GC with JVMStat's visualgc Hai all how to check Tomcat's garbage collectioin with JVMStat's visualgc Rajesh - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
tomcat performance/GC with JVMStat's visualgc
Hai all how to check Tomcat's garbage collectioin with JVMStat's visualgc Rajesh - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: SunONE versus Tomcat performance
Jérôme Duval wrote: Why would you compare Apache and Tomcat vs. SunONE? Isn't there a lot of overhead in using the connector and all that? Seems to me a more logical test would be Tomcat vs SunONE and the most recent version of both, which Tomcat 4.1.30 is not. I smell bogus test results! When I see 2-5 times, I smell bogus results. I know that SunONE is professional, I know that Tomcat is free and contributed, but it CANNOT be 2x-5x faster. Even if SunONE is written in assembler (which I doubt). Even if they wrote it in C++, they still need Java classloader and other stuff. There just isn't that much room for code optimization. If they are stating that with high user load SunONE outperforms Tomcat, I'd say it's either misconfigured Tomcat or connector issues. Nix. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: SunONE versus Tomcat performance
having used SunOne in the past, I would agree 2-5x faster is not likely or even possible. SunOne is a combination of the old Netscape code, jvm and the reference implementation of the servlet spec. In practice, it is no different than servlet containers that use native library for handling sockets. The last time I benchmarked Netscape on a real application, it was slower than tomcat 4.1.x. The configuration and debugging mode of SunOne is also a pain to use and often didn't work correctly. As usual, the only way to know which is better is to write your app and stick to the standard API. Once you have the app done, benchmark the app on both and get real data. Developers should know better than take benchmarks as truth. At best they're only reference points and baseline data. When you consider most servlet containers are already in their 4th/5th release and everyone has had plenty of time to optimize performance and scalability, the differences are not going to be significant at this point. peter On Tue, 03 Aug 2004 08:09:22 +0200, Nikola Milutinovic [EMAIL PROTECTED] wrote: Jérôme Duval wrote: Why would you compare Apache and Tomcat vs. SunONE? Isn't there a lot of overhead in using the connector and all that? Seems to me a more logical test would be Tomcat vs SunONE and the most recent version of both, which Tomcat 4.1.30 is not. I smell bogus test results! When I see 2-5 times, I smell bogus results. I know that SunONE is professional, I know that Tomcat is free and contributed, but it CANNOT be 2x-5x faster. Even if SunONE is written in assembler (which I doubt). Even if they wrote it in C++, they still need Java classloader and other stuff. There just isn't that much room for code optimization. If they are stating that with high user load SunONE outperforms Tomcat, I'd say it's either misconfigured Tomcat or connector issues. Nix. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: SunONE versus Tomcat performance
Why would you compare Apache and Tomcat vs. SunONE? Isn't there a lot of overhead in using the connector and all that? Seems to me a more logical test would be Tomcat vs SunONE and the most recent version of both, which Tomcat 4.1.30 is not. I smell bogus test results! -Original Message- From: V D [mailto:[EMAIL PROTECTED] Sent: Saturday, July 31, 2004 11:24 PM To: Tomcat Users List Subject: Re: SunONE versus Tomcat performance I used it for webservice before, and it is faster than Tomcat, but I wouldn't say that was 2 to 5 times for that particular case. You can get it for free because it's bundled with the Application Server platform which is free. Julian wrote: Just downloaded it to give it a try. There's a trial version but nevertheless it costs only $75. David Rees wrote: David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. It's hard to say why the Apache/Tomcat combination would not perform as well as SunONE (which I am not familar with), but without more details of the Apache/Tomcat configuration it's too difficult to say. Has anyone independantly tested SunONE compared to Apache/Tomcat? -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: SunONE versus Tomcat performance
I am sorry for not being clear enough. The test did not run with both Apache and Tomcat, only Tomcat 5.0. Please understand that I do not try to create a flame war here. This is only a particular case, no scientific comparison, and no pointing out which one is better overall. Please download it yourself, and try with your application if performance is something you want to find out. Jérôme Duval wrote: Why would you compare Apache and Tomcat vs. SunONE? Isn't there a lot of overhead in using the connector and all that? Seems to me a more logical test would be Tomcat vs SunONE and the most recent version of both, which Tomcat 4.1.30 is not. I smell bogus test results! -Original Message- From: V D [mailto:[EMAIL PROTECTED] Sent: Saturday, July 31, 2004 11:24 PM To: Tomcat Users List Subject: Re: SunONE versus Tomcat performance I used it for webservice before, and it is faster than Tomcat, but I wouldn't say that was 2 to 5 times for that particular case. You can get it for free because it's bundled with the Application Server platform which is free. Julian wrote: Just downloaded it to give it a try. There's a trial version but nevertheless it costs only $75. David Rees wrote: David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. It's hard to say why the Apache/Tomcat combination would not perform as well as SunONE (which I am not familar with), but without more details of the Apache/Tomcat configuration it's too difficult to say. Has anyone independantly tested SunONE compared to Apache/Tomcat? -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: SunONE versus Tomcat performance
The report you linked to ran with Apache and Tomcat version 4.1.30. Don't believe me? 3.2 Web Server Configuration 3.2.1 Apache /Tomcat For this test KeyLabs used Apache 2 and Tomcat 4.1.24. The Apache web server was configured with the Coyote connector. During the test all request were directed to the Apache web server, which then routed only the JSP requests to Tomcat. When the Apache server was compiled SSL enabled, and the worker mpm was specified. Tomcat used the Sun Java version 1.4.1_03. In any case, I am just saying that the test results appear bogus to me, because I would use only Tomcat as a web server (for both dynamic and static content). That being said, SunONE might be better then Tomcat, but I don't know because I haven't seen a reliable comparison and haven't tested them myself. Cheers! -Original Message- From: Vy Ho [mailto:[EMAIL PROTECTED] Sent: Monday, August 02, 2004 10:07 AM To: Tomcat Users List Subject: Re: SunONE versus Tomcat performance I am sorry for not being clear enough. The test did not run with both Apache and Tomcat, only Tomcat 5.0. Please understand that I do not try to create a flame war here. This is only a particular case, no scientific comparison, and no pointing out which one is better overall. Please download it yourself, and try with your application if performance is something you want to find out. Jérôme Duval wrote: Why would you compare Apache and Tomcat vs. SunONE? Isn't there a lot of overhead in using the connector and all that? Seems to me a more logical test would be Tomcat vs SunONE and the most recent version of both, which Tomcat 4.1.30 is not. I smell bogus test results! -Original Message- From: V D [mailto:[EMAIL PROTECTED] Sent: Saturday, July 31, 2004 11:24 PM To: Tomcat Users List Subject: Re: SunONE versus Tomcat performance I used it for webservice before, and it is faster than Tomcat, but I wouldn't say that was 2 to 5 times for that particular case. You can get it for free because it's bundled with the Application Server platform which is free. Julian wrote: Just downloaded it to give it a try. There's a trial version but nevertheless it costs only $75. David Rees wrote: David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. It's hard to say why the Apache/Tomcat combination would not perform as well as SunONE (which I am not familar with), but without more details of the Apache/Tomcat configuration it's too difficult to say. Has anyone independantly tested SunONE compared to Apache/Tomcat? -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: SunONE versus Tomcat performance
That wasn't me who put that link out. Check the name. Jérôme Duval wrote: The report you linked to ran with Apache and Tomcat version 4.1.30. Don't believe me? 3.2 Web Server Configuration 3.2.1 Apache /Tomcat For this test KeyLabs used Apache 2 and Tomcat 4.1.24. The Apache web server was configured with the Coyote connector. During the test all request were directed to the Apache web server, which then routed only the JSP requests to Tomcat. When the Apache server was compiled SSL enabled, and the worker mpm was specified. Tomcat used the Sun Java version 1.4.1_03. In any case, I am just saying that the test results appear bogus to me, because I would use only Tomcat as a web server (for both dynamic and static content). That being said, SunONE might be better then Tomcat, but I don't know because I haven't seen a reliable comparison and haven't tested them myself. Cheers! -Original Message- From: Vy Ho [mailto:[EMAIL PROTECTED] Sent: Monday, August 02, 2004 10:07 AM To: Tomcat Users List Subject: Re: SunONE versus Tomcat performance I am sorry for not being clear enough. The test did not run with both Apache and Tomcat, only Tomcat 5.0. Please understand that I do not try to create a flame war here. This is only a particular case, no scientific comparison, and no pointing out which one is better overall. Please download it yourself, and try with your application if performance is something you want to find out. Jérôme Duval wrote: Why would you compare Apache and Tomcat vs. SunONE? Isn't there a lot of overhead in using the connector and all that? Seems to me a more logical test would be Tomcat vs SunONE and the most recent version of both, which Tomcat 4.1.30 is not. I smell bogus test results! -Original Message- From: V D [mailto:[EMAIL PROTECTED] Sent: Saturday, July 31, 2004 11:24 PM To: Tomcat Users List Subject: Re: SunONE versus Tomcat performance I used it for webservice before, and it is faster than Tomcat, but I wouldn't say that was 2 to 5 times for that particular case. You can get it for free because it's bundled with the Application Server platform which is free. Julian wrote: Just downloaded it to give it a try. There's a trial version but nevertheless it costs only $75. David Rees wrote: David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. It's hard to say why the Apache/Tomcat combination would not perform as well as SunONE (which I am not familar with), but without more details of the Apache/Tomcat configuration it's too difficult to say. Has anyone independantly tested SunONE compared to Apache/Tomcat? -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: SunONE versus Tomcat performance
I've just finished reading the report and can find no where in the report that Tomcat failed It *does* indicate that the combination of Apache httpd and Apache Tomcat had problems - but the report does not indicate, as far as I can tell, which component reported the failure. Without knowing where the error came from and what the error was - it's impossible to determine if httpd or Tomcat was the source of the error. I wish the report would have detailed the configurations of all 3 tests as well as some of the errors that were received and where the error came from. That way we could more easily identify what the failing component was. Just my opinion though. On Friday 30 July 2004 05:40 pm, David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. David - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: SunONE versus Tomcat performance
http://news.netcraft.com/archives/2003/04/10/java_servlet_engines.html Above is Sun's market share of production sites. So... .V On Friday 30 July 2004 05:40 pm, David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. David - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: SunONE versus Tomcat performance
I used it for webservice before, and it is faster than Tomcat, but I wouldn't say that was 2 to 5 times for that particular case. You can get it for free because it's bundled with the Application Server platform which is free. Julian wrote: Just downloaded it to give it a try. There's a trial version but nevertheless it costs only $75. David Rees wrote: David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. It's hard to say why the Apache/Tomcat combination would not perform as well as SunONE (which I am not familar with), but without more details of the Apache/Tomcat configuration it's too difficult to say. Has anyone independantly tested SunONE compared to Apache/Tomcat? -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
SunONE versus Tomcat performance
Sun's update on the WSDP 1.4 (http://java.sun.com/developer/technicalArticles/WebServices/JWSDP_1.4/) includes this note about web containers: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. David
Re: SunONE versus Tomcat performance
David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. It's hard to say why the Apache/Tomcat combination would not perform as well as SunONE (which I am not familar with), but without more details of the Apache/Tomcat configuration it's too difficult to say. Has anyone independantly tested SunONE compared to Apache/Tomcat? -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: SunONE versus Tomcat performance
Just downloaded it to give it a try. There's a trial version but nevertheless it costs only $75. David Rees wrote: David Wall wrote: It is worth noting that Sun Java Web Server has better performance than Apache Tomcat; you can learn more about this from Sun Java Web Server vs. Apache/Tomcat Benchmarks. The link to the KeyLabs report is at http://www.keylabs.com/results/sun/SunONEFinalReport_Solaris.pdf Why would SunONE be anywhere from 2 to 5 times faster than Tomcat? They also suggest that Tomcat would start to show errors when loading 200 users at a time, whereas SunONE could handle up to 500 users without any errors. It's hard to say why the Apache/Tomcat combination would not perform as well as SunONE (which I am not familar with), but without more details of the Apache/Tomcat configuration it's too difficult to say. Has anyone independantly tested SunONE compared to Apache/Tomcat? -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
I'm sending my JVM stack trace to see if any of you are better at reading it than I am. ;-) I'm guessing that you can somehow tell by looking at the stack trace whether the connections between apache and tomcat are somehow being held onto or locked waiting for something and not released. Maybe a database connection is not released? Maybe apache graceful causes the problem? Any input is appreciated. Thanks for your help! apache version 2.0.40 mod_jk 2.0.2 tomcat 4.1.27 and 4.1.30 I've attached the javacore file (I stripped out classloader lines since they take up the majority of the file) Let me know if you need to see those. Daniel Gibby David Rees wrote: Daniel Gibby wrote: Tomcat config: Connector className="org.apache.catalina.connector.http.HttpConnector" port="8080" minProcessors="5" maxProcessors="255" enableLookups="true" redirectPort="8443" acceptCount="100" debug="0" connectionTimeout="6"/ Hey, I just realized something... I think I have been having lockups around every 16 hours... 6 seconds! So what does that mean about this configuration? connectionTimeout is defined in milliseconds, not seconds, so that is 60 seconds, not 16 hours. Is some servlet not returning content but hanging on to a connection? Could be, or could be that your server is really busy. When you look at the server-status through Apache, does it show 255 processes busy as well? Could you explain a little further about 'bug in a servlet causing it to not return'? You could either have a deadlock (synchronization issue) in your code, or an infinite loop. I have a stack trace, but I don't see how that helps me figure out where my problem might be... I'm not sure what exactly to look for. Compress it and post it to the list or put it on a public webserver so we can take a look. Cheers Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] javacore.20040413.36.23498-short.txt.gz Description: application/gzip - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance issue?
Hi, Absolutely. Peter and I have been preaching this for years now ;) I'm glad this has helped you... Yoav Shapira Millennium Research Informatics -Original Message- From: Peter Lin [mailto:[EMAIL PROTECTED] Sent: Monday, April 12, 2004 10:17 PM To: Tomcat Users List Subject: RE: Tomcat performance issue? glad the suggestion helps. I firmly believe in profiling code to make sure simple little mistakes that appear harmless aren't killing performance. I'm constantly amazed at how little things improve performance. the benefit of using OptimizeIt or any other good profiling tool is well worth it. that's my biased perspective :) peter lin --- Allistair Crossley [EMAIL PROTECTED] wrote: This evening I did the same with JProbe under 360 requests as you describe and this led to me gaining a 38% speedup. The main bottleneck I found was some very simple tags I have were calling out.flush() at the end. Thiw was consuming 14 seconds of time to flush 1 string from the tag. The tag is called many times within our JSPs because it calls the current skin label. By simply removing the flush call the tag call method time across the load test went down to 2s. Not bad hey. There were other areas which I solved with application scope caching and a bean pool for a 3rd party bean that takes ages to initialise a connection. I am getting there slowly but surely but Yoav I think was right all along and it is the code and you have to profile it and examine those call graphs!!! ADC -Original Message- From: Peter Lin [mailto:[EMAIL PROTECTED] Sent: Mon 12/04/2004 19:53 To: Tomcat Users List Cc: Subject: Re: Tomcat performance issue? luckily I have a license of Borland OptimizeIt. What I do is I start tomcat using OptimizeIt. Then I create a test plan in JMeter. Once tomcat is running, I warm it up by sending it a couple hundred requests to make sure all the pages are compiled. before the test starts, use OptimizeIt to garbage collect. Once that is done, I start the test and look at the number of threads and size of the heap. If there's a memory leak, either the thread count will increase, or the heap will grow rapidly. Once I see either one, I then switch to the call graph to get a better picture of which methods are getting called. Usually, that is enough to point towards a culprit. repeat, and rinse as many times as needed until you've squashed all bugs and leaks. peter lin Matt Woodings [EMAIL PROTECTED] wrote: I just read your post this morning (I am lurking today as I have a few issues of my own to clear up :-) ) and I think that is some really good advice you gave. I do have a question though. Once you have noticed you have a memory leak, how do you go about locating it? Matt - Do you Yahoo!? Yahoo! Tax Center - File online by April 15th FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Developers of QuickAddress Software a href=http://www.qas.com;www.qas.com/a Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Small Business $15K Web Design Giveaway http://promotions.yahoo.com/design_giveaway/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
I have this same problem. It creeped up without any configuration changes on 4.1.27 It doesn't always print this error message out, but the effect is the same. SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status My apache config: Timeouts: connection: 300keep-alive: 300 MPM Name: Prefork MPM Information: Max Daemons: 255 Threaded: no Forked: yes IfModule prefork.c StartServers 8 MinSpareServers5 MaxSpareServers 20 MaxClients 255 MaxRequestsPerChild 1000 /IfModule Tomcat config: Connector className=org.apache.catalina.connector.http.HttpConnector port=8080 minProcessors=5 maxProcessors=255 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=6/ Hey, I just realized something... I think I have been having lockups around every 16 hours... 6 seconds! So what does that mean about this configuration? Why is the connectionTimeout being reached? I think I had set it to a really high number because I figured I didn't want anything to ever hit it. Is some servlet not returning content but hanging on to a connection? Could you explain a little further about 'bug in a servlet causing it to not return'? I have a stack trace, but I don't see how that helps me figure out where my problem might be... I'm not sure what exactly to look for. Daniel Gibby David Rees wrote: Like the messages say, all Tomcat threads are busy and you've hit the maximum number of threads which can be processed concurrently. Sounds like you've got either a bug in a servlet causing it to not return, or your server is simply overloaded. You can get a stack trace from the JVM to help debug this issue pretty easily. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
I forgot to mention that I have All threads (255) are currently busy, not (75) which makes sense. Daniel Gibby wrote: I have this same problem. It creeped up without any configuration changes on 4.1.27 It doesn't always print this error message out, but the effect is the same. SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status My apache config: Timeouts: connection: 300keep-alive: 300 MPM Name: Prefork MPM Information: Max Daemons: 255 Threaded: no Forked: yes IfModule prefork.c StartServers 8 MinSpareServers5 MaxSpareServers 20 MaxClients 255 MaxRequestsPerChild 1000 /IfModule Tomcat config: Connector className=org.apache.catalina.connector.http.HttpConnector port=8080 minProcessors=5 maxProcessors=255 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=6/ Hey, I just realized something... I think I have been having lockups around every 16 hours... 6 seconds! So what does that mean about this configuration? Why is the connectionTimeout being reached? I think I had set it to a really high number because I figured I didn't want anything to ever hit it. Is some servlet not returning content but hanging on to a connection? Could you explain a little further about 'bug in a servlet causing it to not return'? I have a stack trace, but I don't see how that helps me figure out where my problem might be... I'm not sure what exactly to look for. Daniel Gibby David Rees wrote: Like the messages say, all Tomcat threads are busy and you've hit the maximum number of threads which can be processed concurrently. Sounds like you've got either a bug in a servlet causing it to not return, or your server is simply overloaded. You can get a stack trace from the JVM to help debug this issue pretty easily. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance issue?
It could be a bug in your servlet that hangs your connection or you might actually have a big enough load to max out your number of concurrent Tomcat threads (maxProcessors). If it is load, you should look into increasing your maxProcessors. Make sure though that you have enough JVM heap memory (Xmx parm) to handle it or you will run into OutOfMemory error which is worse than out-of-connections. Jason -Original Message- From: Daniel Gibby [mailto:[EMAIL PROTECTED] Sent: Monday, April 12, 2004 9:43 AM To: Tomcat Users List Subject: Re: Tomcat performance issue? I have this same problem. It creeped up without any configuration changes on 4.1.27 It doesn't always print this error message out, but the effect is the same. SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status My apache config: Timeouts: connection: 300keep-alive: 300 MPM Name: Prefork MPM Information: Max Daemons: 255 Threaded: no Forked: yes IfModule prefork.c StartServers 8 MinSpareServers5 MaxSpareServers 20 MaxClients 255 MaxRequestsPerChild 1000 /IfModule Tomcat config: Connector className=org.apache.catalina.connector.http.HttpConnector port=8080 minProcessors=5 maxProcessors=255 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=6/ Hey, I just realized something... I think I have been having lockups around every 16 hours... 6 seconds! So what does that mean about this configuration? Why is the connectionTimeout being reached? I think I had set it to a really high number because I figured I didn't want anything to ever hit it. Is some servlet not returning content but hanging on to a connection? Could you explain a little further about 'bug in a servlet causing it to not return'? I have a stack trace, but I don't see how that helps me figure out where my problem might be... I'm not sure what exactly to look for. Daniel Gibby David Rees wrote: Like the messages say, all Tomcat threads are busy and you've hit the maximum number of threads which can be processed concurrently. Sounds like you've got either a bug in a servlet causing it to not return, or your server is simply overloaded. You can get a stack trace from the JVM to help debug this issue pretty easily. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
255 is as high as apache will go without recompiling. Therefore, it wouldn't make a difference if I go higher on the tomcat end either, right? Trieu, Jason T - CNF wrote: It could be a bug in your servlet that hangs your connection or you might actually have a big enough load to max out your number of concurrent Tomcat threads (maxProcessors). If it is load, you should look into increasing your maxProcessors. Make sure though that you have enough JVM heap memory (Xmx parm) to handle it or you will run into OutOfMemory error which is worse than out-of-connections. Jason -Original Message- From: Daniel Gibby [mailto:[EMAIL PROTECTED] Sent: Monday, April 12, 2004 9:43 AM To: Tomcat Users List Subject: Re: Tomcat performance issue? I have this same problem. It creeped up without any configuration changes on 4.1.27 It doesn't always print this error message out, but the effect is the same. SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status My apache config: Timeouts: connection: 300keep-alive: 300 MPM Name: Prefork MPM Information: Max Daemons: 255 Threaded: no Forked: yes IfModule prefork.c StartServers 8 MinSpareServers5 MaxSpareServers 20 MaxClients 255 MaxRequestsPerChild 1000 /IfModule Tomcat config: Connector className=org.apache.catalina.connector.http.HttpConnector port=8080 minProcessors=5 maxProcessors=255 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=6/ Hey, I just realized something... I think I have been having lockups around every 16 hours... 6 seconds! So what does that mean about this configuration? Why is the connectionTimeout being reached? I think I had set it to a really high number because I figured I didn't want anything to ever hit it. Is some servlet not returning content but hanging on to a connection? Could you explain a little further about 'bug in a servlet causing it to not return'? I have a stack trace, but I don't see how that helps me figure out where my problem might be... I'm not sure what exactly to look for. Daniel Gibby David Rees wrote: Like the messages say, all Tomcat threads are busy and you've hit the maximum number of threads which can be processed concurrently. Sounds like you've got either a bug in a servlet causing it to not return, or your server is simply overloaded. You can get a stack trace from the JVM to help debug this issue pretty easily. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
Daniel Gibby wrote: Tomcat config: Connector className=org.apache.catalina.connector.http.HttpConnector port=8080 minProcessors=5 maxProcessors=255 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=6/ Hey, I just realized something... I think I have been having lockups around every 16 hours... 6 seconds! So what does that mean about this configuration? connectionTimeout is defined in milliseconds, not seconds, so that is 60 seconds, not 16 hours. Is some servlet not returning content but hanging on to a connection? Could be, or could be that your server is really busy. When you look at the server-status through Apache, does it show 255 processes busy as well? Could you explain a little further about 'bug in a servlet causing it to not return'? You could either have a deadlock (synchronization issue) in your code, or an infinite loop. I have a stack trace, but I don't see how that helps me figure out where my problem might be... I'm not sure what exactly to look for. Compress it and post it to the list or put it on a public webserver so we can take a look. Cheers Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
From my own experience, this kind of behavior appears when a session isn't getting timed out for one reason or another. For example, say you get data from some remote site using your own Http client libraries that is multi-threaded. If that thread sits around and the socket it has isn't explicitly closed, it can prevent tomcat from invalidating the session. this would create a memory leak which may not be noticeable if you don't get a lot of load. One easy way to expose this kind of bug is to load test your webapp before deploying. Throw the load you get in 16 hrs at tomcat and you'll likely see the memory leak. In all cases, issues with performance was due to a bug in our application. egular load testing is the best way to expose these issues during development. peter David Rees [EMAIL PROTECTED] wrote: Daniel Gibby wrote: Tomcat config: className=org.apache.catalina.connector.http.HttpConnector port=8080 minProcessors=5 maxProcessors=255 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=6/ Hey, I just realized something... I think I have been having lockups around every 16 hours... 6 seconds! So what does that mean about this configuration? connectionTimeout is defined in milliseconds, not seconds, so that is 60 seconds, not 16 hours. Is some servlet not returning content but hanging on to a connection? Could be, or could be that your server is really busy. When you look at the server-status through Apache, does it show 255 processes busy as well? Could you explain a little further about 'bug in a servlet causing it to not return'? You could either have a deadlock (synchronization issue) in your code, or an infinite loop. I have a stack trace, but I don't see how that helps me figure out where my problem might be... I'm not sure what exactly to look for. Compress it and post it to the list or put it on a public webserver so we can take a look. Cheers Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? Yahoo! Tax Center - File online by April 15th
Re: Tomcat performance issue?
I just read your post this morning (I am lurking today as I have a few issues of my own to clear up :-) ) and I think that is some really good advice you gave. I do have a question though. Once you have noticed you have a memory leak, how do you go about locating it? Matt - Original Message - From: Peter Lin [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Monday, April 12, 2004 1:07 PM Subject: Re: Tomcat performance issue? From my own experience, this kind of behavior appears when a session isn't getting timed out for one reason or another. For example, say you get data from some remote site using your own Http client libraries that is multi-threaded. If that thread sits around and the socket it has isn't explicitly closed, it can prevent tomcat from invalidating the session. this would create a memory leak which may not be noticeable if you don't get a lot of load. One easy way to expose this kind of bug is to load test your webapp before deploying. Throw the load you get in 16 hrs at tomcat and you'll likely see the memory leak. In all cases, issues with performance was due to a bug in our application. egular load testing is the best way to expose these issues during development. peter David Rees [EMAIL PROTECTED] wrote: Daniel Gibby wrote: Tomcat config: className=org.apache.catalina.connector.http.HttpConnector port=8080 minProcessors=5 maxProcessors=255 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=6/ Hey, I just realized something... I think I have been having lockups around every 16 hours... 6 seconds! So what does that mean about this configuration? connectionTimeout is defined in milliseconds, not seconds, so that is 60 seconds, not 16 hours. Is some servlet not returning content but hanging on to a connection? Could be, or could be that your server is really busy. When you look at the server-status through Apache, does it show 255 processes busy as well? Could you explain a little further about 'bug in a servlet causing it to not return'? You could either have a deadlock (synchronization issue) in your code, or an infinite loop. I have a stack trace, but I don't see how that helps me figure out where my problem might be... I'm not sure what exactly to look for. Compress it and post it to the list or put it on a public webserver so we can take a look. Cheers Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? Yahoo! Tax Center - File online by April 15th - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance issue?
Hi, Once you have noticed you have a memory leak, how do you go about locating it? You don't just notice it out of the blue: you typically notice it because a profiler shows it. The same profiler shows you where it is. Noticing and locating is typically one and the same for memory leaks. It's fixing that's the 2nd step. Yoav Shapira This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
luckily I have a license of Borland OptimizeIt. What I do is I start tomcat using OptimizeIt. Then I create a test plan in JMeter. Once tomcat is running, I warm it up by sending it a couple hundred requests to make sure all the pages are compiled. before the test starts, use OptimizeIt to garbage collect. Once that is done, I start the test and look at the number of threads and size of the heap. If there's a memory leak, either the thread count will increase, or the heap will grow rapidly. Once I see either one, I then switch to the call graph to get a better picture of which methods are getting called. Usually, that is enough to point towards a culprit. repeat, and rinse as many times as needed until you've squashed all bugs and leaks. peter lin Matt Woodings [EMAIL PROTECTED] wrote: I just read your post this morning (I am lurking today as I have a few issues of my own to clear up :-) ) and I think that is some really good advice you gave. I do have a question though. Once you have noticed you have a memory leak, how do you go about locating it? Matt - Do you Yahoo!? Yahoo! Tax Center - File online by April 15th
RE: Tomcat performance issue?
This evening I did the same with JProbe under 360 requests as you describe and this led to me gaining a 38% speedup. The main bottleneck I found was some very simple tags I have were calling out.flush() at the end. Thiw was consuming 14 seconds of time to flush 1 string from the tag. The tag is called many times within our JSPs because it calls the current skin label. By simply removing the flush call the tag call method time across the load test went down to 2s. Not bad hey. There were other areas which I solved with application scope caching and a bean pool for a 3rd party bean that takes ages to initialise a connection. I am getting there slowly but surely but Yoav I think was right all along and it is the code and you have to profile it and examine those call graphs!!! ADC -Original Message- From: Peter Lin [mailto:[EMAIL PROTECTED] Sent: Mon 12/04/2004 19:53 To: Tomcat Users List Cc: Subject: Re: Tomcat performance issue? luckily I have a license of Borland OptimizeIt. What I do is I start tomcat using OptimizeIt. Then I create a test plan in JMeter. Once tomcat is running, I warm it up by sending it a couple hundred requests to make sure all the pages are compiled. before the test starts, use OptimizeIt to garbage collect. Once that is done, I start the test and look at the number of threads and size of the heap. If there's a memory leak, either the thread count will increase, or the heap will grow rapidly. Once I see either one, I then switch to the call graph to get a better picture of which methods are getting called. Usually, that is enough to point towards a culprit. repeat, and rinse as many times as needed until you've squashed all bugs and leaks. peter lin Matt Woodings [EMAIL PROTECTED] wrote: I just read your post this morning (I am lurking today as I have a few issues of my own to clear up :-) ) and I think that is some really good advice you gave. I do have a question though. Once you have noticed you have a memory leak, how do you go about locating it? Matt - Do you Yahoo!? Yahoo! Tax Center - File online by April 15th FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Developers of QuickAddress Software a href=http://www.qas.com;www.qas.com/a Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance issue?
glad the suggestion helps. I firmly believe in profiling code to make sure simple little mistakes that appear harmless aren't killing performance. I'm constantly amazed at how little things improve performance. the benefit of using OptimizeIt or any other good profiling tool is well worth it. that's my biased perspective :) peter lin --- Allistair Crossley [EMAIL PROTECTED] wrote: This evening I did the same with JProbe under 360 requests as you describe and this led to me gaining a 38% speedup. The main bottleneck I found was some very simple tags I have were calling out.flush() at the end. Thiw was consuming 14 seconds of time to flush 1 string from the tag. The tag is called many times within our JSPs because it calls the current skin label. By simply removing the flush call the tag call method time across the load test went down to 2s. Not bad hey. There were other areas which I solved with application scope caching and a bean pool for a 3rd party bean that takes ages to initialise a connection. I am getting there slowly but surely but Yoav I think was right all along and it is the code and you have to profile it and examine those call graphs!!! ADC -Original Message- From: Peter Lin [mailto:[EMAIL PROTECTED] Sent: Mon 12/04/2004 19:53 To: Tomcat Users List Cc: Subject: Re: Tomcat performance issue? luckily I have a license of Borland OptimizeIt. What I do is I start tomcat using OptimizeIt. Then I create a test plan in JMeter. Once tomcat is running, I warm it up by sending it a couple hundred requests to make sure all the pages are compiled. before the test starts, use OptimizeIt to garbage collect. Once that is done, I start the test and look at the number of threads and size of the heap. If there's a memory leak, either the thread count will increase, or the heap will grow rapidly. Once I see either one, I then switch to the call graph to get a better picture of which methods are getting called. Usually, that is enough to point towards a culprit. repeat, and rinse as many times as needed until you've squashed all bugs and leaks. peter lin Matt Woodings [EMAIL PROTECTED] wrote: I just read your post this morning (I am lurking today as I have a few issues of my own to clear up :-) ) and I think that is some really good advice you gave. I do have a question though. Once you have noticed you have a memory leak, how do you go about locating it? Matt - Do you Yahoo!? Yahoo! Tax Center - File online by April 15th FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Developers of QuickAddress Software a href=http://www.qas.com;www.qas.com/a Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Small Business $15K Web Design Giveaway http://promotions.yahoo.com/design_giveaway/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
Denise Mangano wrote, On 4/9/2004 10:05 PM: I've tried searching the archives but have come up empty-handed. A few days ago I received a few complaints that my users hit a certain point in the application and could go no further. This point was when Apache gives control to Tomcat. I checked the log and found this. Apr 4, 2004 2:19:43 PM org.apache.tomcat.util.threads.ThreadPool logFull SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status The only thing that did the trick was restarting Tomcat and Apache. Any ideas on what these errors mean? Like the messages say, all Tomcat threads are busy and you've hit the maximum number of threads which can be processed concurrently. Sounds like you've got either a bug in a servlet causing it to not return, or your server is simply overloaded. You can get a stack trace from the JVM to help debug this issue pretty easily. -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issue?
David Rees [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Denise Mangano wrote, On 4/9/2004 10:05 PM: I've tried searching the archives but have come up empty-handed. A few days ago I received a few complaints that my users hit a certain point in the application and could go no further. This point was when Apache gives control to Tomcat. I checked the log and found this. Apr 4, 2004 2:19:43 PM org.apache.tomcat.util.threads.ThreadPool logFull SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status The only thing that did the trick was restarting Tomcat and Apache. Any ideas on what these errors mean? Like the messages say, all Tomcat threads are busy and you've hit the maximum number of threads which can be processed concurrently. Sounds like you've got either a bug in a servlet causing it to not return, or your server is simply overloaded. You can get a stack trace from the JVM to help debug this issue pretty easily. Also, when running behind Apache, you have need to have at least as many Tomcat threads as you have Apache children allowed (since each child will be talking to a single thread). You should probably increase the maxThreads on you AJP/1.3 Connector to match what you've configured for MaxChildren in Apache. If you expect your loads to come in bursts, then you can configure maxSpareThreads low to allow Tomcat to discard threads that are freed up by Apache killing off children. -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Autoreply: Re: Tomcat performance issue?
Hello, Due to the increased volume of SPAM this mailbox has been closed. Please contact us via http://www.directxtras.com/ContactUS.asp We apology for the inconvenience. Best Regards, -- The DirectXtras Team - DirectXtras - Xtra Power for Director and Authorware - http://www.directxtras.com Sites with something to say - http://www.SpeaksForItself.com - Your message reads: Received: from mail.apache.org (unverified [208.185.179.12]) by mail2.intermedia.net (Rockliffe SMTPRA 4.5.6) with SMTP id [EMAIL PROTECTED] for [EMAIL PROTECTED]; Sat, 10 Apr 2004 12:45:24 -0700 Received: (qmail 61062 invoked by uid 500); 10 Apr 2004 19:45:04 - Mailing-List: contact [EMAIL PROTECTED]; run by ezmlm Precedence: bulk List-Unsubscribe: mailto:[EMAIL PROTECTED] List-Subscribe: mailto:[EMAIL PROTECTED] List-Help: mailto:[EMAIL PROTECTED] List-Post: mailto:[EMAIL PROTECTED] List-Id: Tomcat Users List tomcat-user.jakarta.apache.org Reply-To: Tomcat Users List [EMAIL PROTECTED] Delivered-To: mailing list [EMAIL PROTECTED] Received: (qmail 61040 invoked from network); 10 Apr 2004 19:45:03 - Received: from unknown (HELO main.gmane.org) (80.91.224.249) by daedalus.apache.org with SMTP; 10 Apr 2004 19:45:03 - Received: from list by main.gmane.org with local (Exim 3.35 #1 (Debian)) id 1BCOPc-0001fg-00 for [EMAIL PROTECTED]; Sat, 10 Apr 2004 21:45:08 +0200 Received: from lsanca1-ar19-4-46-072-212.lsanca1.dsl-verizon.net ([4.46.72.212]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for [EMAIL PROTECTED]; Sat, 10 Apr 2004 21:45:08 +0200 Received: from wbarker by lsanca1-ar19-4-46-072-212.lsanca1.dsl-verizon.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for [EMAIL PROTECTED]; Sat, 10 Apr 2004 21:45:08 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: [EMAIL PROTECTED] From: Bill Barker [EMAIL PROTECTED] Subject: Re: Tomcat performance issue? Date: Sat, 10 Apr 2004 12:58:23 -0700 Lines: 35 Message-ID: [EMAIL PROTECTED] References: [EMAIL PROTECTED] [EMAIL PROTECTED] X-Complaints-To: [EMAIL PROTECTED] X-Gmane-NNTP-Posting-Host: lsanca1-ar19-4-46-072-212.lsanca1.dsl-verizon.net X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Sender: news [EMAIL PROTECTED] X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N David Rees [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Denise Mangano wrote, On 4/9/2004 10:05 PM: I've tried searching the archives but have come up empty-handed. A few days ago I received a few complaints that my users hit a certain point in the application and could go no further. This point was when Apache gives control to Tomcat. I checked the log and found this. Apr 4, 2004 2:19:43 PM org.apache.tomcat.util.threads.ThreadPool logFull SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status The only thing that did the trick was restarting Tomcat and Apache. Any ideas on what these errors mean? Like the messages say, all Tomcat threads are busy and you've hit the maximum number of threads which can be processed concurrently. Sounds like you've got either a bug in a servlet causing it to not return, or your server is simply overloaded. You can get a stack trace from the JVM to help debug this issue pretty easily. Also, when running behind Apache, you have need to have at least as many Tomcat threads as you have Apache children allowed (since each child will be talking to a single thread). You should probably increase the maxThreads on you AJP/1.3 Connector to match what you've configured for MaxChildren in Apache. If you expect your loads to come in bursts, then you can configure maxSpareThreads low to allow Tomcat to discard threads that are freed up by Apache killing off children. -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat performance issue?
Hi all, I've tried searching the archives but have come up empty-handed. A few days ago I received a few complaints that my users hit a certain point in the application and could go no further. This point was when Apache gives control to Tomcat. I checked the log and found this. Apr 4, 2004 2:19:43 PM org.apache.tomcat.util.threads.ThreadPool logFull SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status The only thing that did the trick was restarting Tomcat and Apache. Any ideas on what these errors mean? Thanks in advance. Denise Mangano Complus Data Innovations, Inc. 914-747-1200
RE: Can AccessLogValve Cause Tomcat Performance Hit?
Hi, There's negligible performance difference between AccessLogValve and its Extended cousin, at least in my benchmarks. Yoav Shapira Millennium Research Informatics -Original Message- From: Tim Funk [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 07, 2004 5:37 PM To: Tomcat Users List Subject: Re: Can AccessLogValve Cause Tomcat Performance Hit? You can try to use ExtendedAccessLogValve. It parses the pattern on initialization and uses and array and switch statement to determine what to print. (In the hope that it would be faster) OTOH - the problem could be the writing of log data to disk. -Tim Dan Barron wrote: Certainly one understands the costs of adding processing in the pipeline, but AccessLogValve seems to come with a large price to performance even with DNS lookups turned off and minimal fields being saved in the output. We have turned it off for now and tomcat performance is significantly improved. Any other methods to get access logs out of Tomcat w/o using AccessLogValve? I suppose I could write my own, but would prefer a known solution. Dan Barron Destination Software LLC [EMAIL PROTECTED] At 05:57 AM 4/7/2004, Shapira, Yoav wrote: Hi, How can you expect the addition of ANY component to the processing pipeline NOT to cause a performance hit? Of course AccessLogValve adds something, nothing comes for free. You can control the hit by modifying what you're logging and disabling DNS lookups, as others have suggested. Yoav Shapira Millennium Research Informatics -Original Message- From: Dan Barron [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 07, 2004 2:09 AM To: Tomcat Users List Cc: Dan Anderson Subject: Can AccessLogValve Cause Tomcat Performance Hit? Hello, We are seeing a performance hit to our server whenever we turn on AccessLogValve for a virtual host in tomcat. Is this common or has anyone else experienced this? Any suggestions on how to configure for optimal performance? Below is the virtual host entry in server.xml - tomcat is running stand alone on a Red Hat 9 Linux box - the box is dedicated to running tomcat - there are two virtual hosts configured for the server, and only one has any real traffic. Host name=www.mysite.net debug=0 appBase=webapps unpackWARs=true autoDeploy=true xmlValidation=false xmlNamespaceAware=false !-- Aliaswww.mysite.net/Alias -- Logger className=org.apache.catalina.logger.FileLogger directory=logs prefix=mysite.net. suffix=.txt timestamp=true/ Valve className=org.apache.catalina.valves.AccessLogValve directory=logs/mysite.net-acesslogs pattern=%t %a %A %h %m %p %U prefix=access_log. suffix=.txt timestamp=true/ Context path= docBase=mysite.net/production debug=0/ /Host Thanks in advance! Dan Barron [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Can AccessLogValve Cause Tomcat Performance Hit?
Hello, We are seeing a performance hit to our server whenever we turn on AccessLogValve for a virtual host in tomcat. Is this common or has anyone else experienced this? Any suggestions on how to configure for optimal performance? Below is the virtual host entry in server.xml - tomcat is running stand alone on a Red Hat 9 Linux box - the box is dedicated to running tomcat - there are two virtual hosts configured for the server, and only one has any real traffic. Host name=www.mysite.net debug=0 appBase=webapps unpackWARs=true autoDeploy=true xmlValidation=false xmlNamespaceAware=false !-- Aliaswww.mysite.net/Alias -- Logger className=org.apache.catalina.logger.FileLogger directory=logs prefix=mysite.net. suffix=.txt timestamp=true/ Valve className=org.apache.catalina.valves.AccessLogValve directory=logs/mysite.net-acesslogs pattern=%t %a %A %h %m %p %U prefix=access_log. suffix=.txt timestamp=true/ Context path= docBase=mysite.net/production debug=0/ /Host Thanks in advance! Dan Barron [EMAIL PROTECTED]
Re: Can AccessLogValve Cause Tomcat Performance Hit?
Yes I can believe there is a performance hit. The valve reparses the string on every request. Since the Valve also uses a SimpleDateFormtatter - I think it is also restricted by the sync block imposed by that class. -Tim Dan Barron wrote: Hello, We are seeing a performance hit to our server whenever we turn on AccessLogValve for a virtual host in tomcat. Is this common or has anyone else experienced this? Any suggestions on how to configure for optimal performance? Below is the virtual host entry in server.xml - tomcat is running stand alone on a Red Hat 9 Linux box - the box is dedicated to running tomcat - there are two virtual hosts configured for the server, and only one has any real traffic. Host name=www.mysite.net debug=0 appBase=webapps unpackWARs=true autoDeploy=true xmlValidation=false xmlNamespaceAware=false !-- Aliaswww.mysite.net/Alias -- Logger className=org.apache.catalina.logger.FileLogger directory=logs prefix=mysite.net. suffix=.txt timestamp=true/ Valve className=org.apache.catalina.valves.AccessLogValve directory=logs/mysite.net-acesslogs pattern=%t %a %A %h %m %p %U prefix=access_log. suffix=.txt timestamp=true/ Context path= docBase=mysite.net/production debug=0/ /Host - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can AccessLogValve Cause Tomcat Performance Hit?
Tim Funk wrote: Yes I can believe there is a performance hit. The valve reparses the string on every request. Since the Valve also uses a SimpleDateFormtatter - I think it is also restricted by the sync block imposed by that class. Another thing: If you enabled host lookup on the connector, it can also cause big problems with the access log. -- x Rémy Maucherat Developer Consultant JBoss Group (Europe) SàRL x - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Can AccessLogValve Cause Tomcat Performance Hit?
Hi, How can you expect the addition of ANY component to the processing pipeline NOT to cause a performance hit? Of course AccessLogValve adds something, nothing comes for free. You can control the hit by modifying what you're logging and disabling DNS lookups, as others have suggested. Yoav Shapira Millennium Research Informatics -Original Message- From: Dan Barron [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 07, 2004 2:09 AM To: Tomcat Users List Cc: Dan Anderson Subject: Can AccessLogValve Cause Tomcat Performance Hit? Hello, We are seeing a performance hit to our server whenever we turn on AccessLogValve for a virtual host in tomcat. Is this common or has anyone else experienced this? Any suggestions on how to configure for optimal performance? Below is the virtual host entry in server.xml - tomcat is running stand alone on a Red Hat 9 Linux box - the box is dedicated to running tomcat - there are two virtual hosts configured for the server, and only one has any real traffic. Host name=www.mysite.net debug=0 appBase=webapps unpackWARs=true autoDeploy=true xmlValidation=false xmlNamespaceAware=false !-- Aliaswww.mysite.net/Alias -- Logger className=org.apache.catalina.logger.FileLogger directory=logs prefix=mysite.net. suffix=.txt timestamp=true/ Valve className=org.apache.catalina.valves.AccessLogValve directory=logs/mysite.net-acesslogs pattern=%t %a %A %h %m %p %U prefix=access_log. suffix=.txt timestamp=true/ Context path= docBase=mysite.net/production debug=0/ /Host Thanks in advance! Dan Barron [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Can AccessLogValve Cause Tomcat Performance Hit?
Certainly one understands the costs of adding processing in the pipeline, but AccessLogValve seems to come with a large price to performance even with DNS lookups turned off and minimal fields being saved in the output. We have turned it off for now and tomcat performance is significantly improved. Any other methods to get access logs out of Tomcat w/o using AccessLogValve? I suppose I could write my own, but would prefer a known solution. Dan Barron Destination Software LLC [EMAIL PROTECTED] At 05:57 AM 4/7/2004, Shapira, Yoav wrote: Hi, How can you expect the addition of ANY component to the processing pipeline NOT to cause a performance hit? Of course AccessLogValve adds something, nothing comes for free. You can control the hit by modifying what you're logging and disabling DNS lookups, as others have suggested. Yoav Shapira Millennium Research Informatics -Original Message- From: Dan Barron [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 07, 2004 2:09 AM To: Tomcat Users List Cc: Dan Anderson Subject: Can AccessLogValve Cause Tomcat Performance Hit? Hello, We are seeing a performance hit to our server whenever we turn on AccessLogValve for a virtual host in tomcat. Is this common or has anyone else experienced this? Any suggestions on how to configure for optimal performance? Below is the virtual host entry in server.xml - tomcat is running stand alone on a Red Hat 9 Linux box - the box is dedicated to running tomcat - there are two virtual hosts configured for the server, and only one has any real traffic. Host name=www.mysite.net debug=0 appBase=webapps unpackWARs=true autoDeploy=true xmlValidation=false xmlNamespaceAware=false !-- Aliaswww.mysite.net/Alias -- Logger className=org.apache.catalina.logger.FileLogger directory=logs prefix=mysite.net. suffix=.txt timestamp=true/ Valve className=org.apache.catalina.valves.AccessLogValve directory=logs/mysite.net-acesslogs pattern=%t %a %A %h %m %p %U prefix=access_log. suffix=.txt timestamp=true/ Context path= docBase=mysite.net/production debug=0/ /Host Thanks in advance! Dan Barron [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can AccessLogValve Cause Tomcat Performance Hit?
You can try to use ExtendedAccessLogValve. It parses the pattern on initialization and uses and array and switch statement to determine what to print. (In the hope that it would be faster) OTOH - the problem could be the writing of log data to disk. -Tim Dan Barron wrote: Certainly one understands the costs of adding processing in the pipeline, but AccessLogValve seems to come with a large price to performance even with DNS lookups turned off and minimal fields being saved in the output. We have turned it off for now and tomcat performance is significantly improved. Any other methods to get access logs out of Tomcat w/o using AccessLogValve? I suppose I could write my own, but would prefer a known solution. Dan Barron Destination Software LLC [EMAIL PROTECTED] At 05:57 AM 4/7/2004, Shapira, Yoav wrote: Hi, How can you expect the addition of ANY component to the processing pipeline NOT to cause a performance hit? Of course AccessLogValve adds something, nothing comes for free. You can control the hit by modifying what you're logging and disabling DNS lookups, as others have suggested. Yoav Shapira Millennium Research Informatics -Original Message- From: Dan Barron [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 07, 2004 2:09 AM To: Tomcat Users List Cc: Dan Anderson Subject: Can AccessLogValve Cause Tomcat Performance Hit? Hello, We are seeing a performance hit to our server whenever we turn on AccessLogValve for a virtual host in tomcat. Is this common or has anyone else experienced this? Any suggestions on how to configure for optimal performance? Below is the virtual host entry in server.xml - tomcat is running stand alone on a Red Hat 9 Linux box - the box is dedicated to running tomcat - there are two virtual hosts configured for the server, and only one has any real traffic. Host name=www.mysite.net debug=0 appBase=webapps unpackWARs=true autoDeploy=true xmlValidation=false xmlNamespaceAware=false !-- Aliaswww.mysite.net/Alias -- Logger className=org.apache.catalina.logger.FileLogger directory=logs prefix=mysite.net. suffix=.txt timestamp=true/ Valve className=org.apache.catalina.valves.AccessLogValve directory=logs/mysite.net-acesslogs pattern=%t %a %A %h %m %p %U prefix=access_log. suffix=.txt timestamp=true/ Context path= docBase=mysite.net/production debug=0/ /Host Thanks in advance! Dan Barron [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
tomcat performance with 100 webapps
Have some one tested Tomcat with more than 100 webapps. For example e-commrece solution, without many bells and whistles - jsut shopbuilder and sopiing cart Each webapp is based on trubine/velocity/torque. Each webapp using it's own firebird database. Can I expect smooth performance on dual xeon with raid controler and lot of RAM (16G) on RedHat EAS? Niki Icygen Co. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: tomcat performance with 100 webapps
Hi, We have tomcat instances that run ~20 webapps without a problem. Beyond that, we haven't tried, but then again that's why we have tools like JMeter, no? ;) In large part this will depend on the soundness of the application. Especially if it's 100 of the same app, because then each memory leak would be multiplied by 100. Yoav Shapira Millennium Research Informatics -Original Message- From: Niki Ivanchev [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 30, 2004 9:43 AM To: Tomcat User Subject: tomcat performance with 100 webapps Have some one tested Tomcat with more than 100 webapps. For example e-commrece solution, without many bells and whistles - jsut shopbuilder and sopiing cart Each webapp is based on trubine/velocity/torque. Each webapp using it's own firebird database. Can I expect smooth performance on dual xeon with raid controler and lot of RAM (16G) on RedHat EAS? Niki Icygen Co. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: tomcat performance with 100 webapps
God save our apps from any memory leaks. Of course we will test them for this issue. And perform stress testing 20 sounds fair enought. Frankly I don't expect too much traffic per e-shop. Niki Shapira, Yoav wrote: Hi, We have tomcat instances that run ~20 webapps without a problem. Beyond that, we haven't tried, but then again that's why we have tools like JMeter, no? ;) In large part this will depend on the soundness of the application. Especially if it's 100 of the same app, because then each memory leak would be multiplied by 100. Yoav Shapira Millennium Research Informatics -Original Message- From: Niki Ivanchev [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 30, 2004 9:43 AM To: Tomcat User Subject: tomcat performance with 100 webapps Have some one tested Tomcat with more than 100 webapps. For example e-commrece solution, without many bells and whistles - jsut shopbuilder and sopiing cart Each webapp is based on trubine/velocity/torque. Each webapp using it's own firebird database. Can I expect smooth performance on dual xeon with raid controler and lot of RAM (16G) on RedHat EAS? Niki Icygen Co. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: tomcat performance with 100 webapps
Niki Ivanchev wrote: Have some one tested Tomcat with more than 100 webapps. For example e-commrece solution, without many bells and whistles - jsut shopbuilder and sopiing cart Each webapp is based on trubine/velocity/torque. Each webapp using it's own firebird database. Can I expect smooth performance on dual xeon with raid controler and lot of RAM (16G) on RedHat EAS? I recommend using Tomcat 5, since it will save a significant amount of per context resources. You should also use a global datasource, which would give you a global limit on concurrent DB requests. If all webapps use a separate DB, then it could lead to resources problems because of too many connections (but of course, I haven't tested anything). -- x Rémy Maucherat Developer Consultant JBoss Group (Europe) SàRL x - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: tomcat performance with 100 webapps
the only way you will know is to stress test it. I would recommend doing a small test with 10 webapps and a fair amount of load. I can tell you right now if you're not using SSL/TSL hardware acceleration, that's going to be your bottleneck. 20-25 concurrent https requests will max out a 2ghz AMD athlon. Once that happens everything else slows down and performance degrades rapidly. look at the performance numbers in my article. Maybe Remmy can post his old SSL numbers from the benchmarks we ran on tomcat 4. If your shopping cart is efficient, 100 webapps won't matter. Ultimately, the concurrent requests across all webapps will be your bottleneck. After the SSL, the database will be the next major bottleneck. If you're using database sessions to keep track of the shopping cart, use JMeter to figure out the maximum concurrent queries for firebird first. hope that helps. peter lin Niki Ivanchev [EMAIL PROTECTED] wrote: Have some one tested Tomcat with more than 100 webapps. For example e-commrece solution, without many bells and whistles - jsut shopbuilder and sopiing cart Each webapp is based on trubine/velocity/torque. Each webapp using it's own firebird database. Can I expect smooth performance on dual xeon with raid controler and lot of RAM (16G) on RedHat EAS? Niki Icygen Co. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? Yahoo! Finance Tax Center - File online. File on time.
Re: tomcat performance with 100 webapps
Hi, I just wanted to post my info on the subject, even though I dont have 100 hosts on a single machine. We run near 60 hosts on one machine, in 10 instances of tomcat. memory usage has been the biggest problem as our application use cache:ing alot to increase performance. all of those hosts are running fairly complex CMS systems. the computer has 2 Xeon CPUs and 4gigs ram RedHat EAS. The greatest improvement on our memory problem got fixed when we changed the setup of tomcat so that it would not reload contexts and jsp pages. The memory leaks that we had been seeing (ever increasing memory usage of tomcat) stopped. But, in my opinion you should not be seeing some memory problems with 100 hosts (if you have 16g ram). I recomend the usage of several instances of tomcat, but that will be on the cost of memory (one instance seems to use around 30mb (rather basic setup) of ram, even though the profiled usage is alot less), but by doing this you will get way better manageability. I dont think I have to point out the obvious benefits of having several hosts, but one is restarting services will be alot easyer and dealing with all sorts of problems will be easyer. 100 hosts require alot of memory, but everything dependes of course on your application and traffic. This machine is taking on something around 20req/sec average, and the load is (cp from top) load average: 1,08, 1,22, 1,24 But of course cpu power or IO is usually not the bottleneck in java-server-applications. -reynir Niki Ivanchev wrote: God save our apps from any memory leaks. Of course we will test them for this issue. And perform stress testing 20 sounds fair enought. Frankly I don't expect too much traffic per e-shop. Niki Shapira, Yoav wrote: Hi, We have tomcat instances that run ~20 webapps without a problem. Beyond that, we haven't tried, but then again that's why we have tools like JMeter, no? ;) In large part this will depend on the soundness of the application. Especially if it's 100 of the same app, because then each memory leak would be multiplied by 100. Yoav Shapira Millennium Research Informatics -Original Message- From: Niki Ivanchev [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 30, 2004 9:43 AM To: Tomcat User Subject: tomcat performance with 100 webapps Have some one tested Tomcat with more than 100 webapps. For example e-commrece solution, without many bells and whistles - jsut shopbuilder and sopiing cart Each webapp is based on trubine/velocity/torque. Each webapp using it's own firebird database. Can I expect smooth performance on dual xeon with raid controler and lot of RAM (16G) on RedHat EAS? Niki Icygen Co. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: tomcat performance with 100 webapps
Pardon my ignorance but how do you share one port between multiple instances of tomcat? Are you talking launching tomcat 100 times (100 JVMs), or are you talking 100 Hosts configured in server.xml? Adam On 03/30/2004 05:28 PM Reynir Þór Hübner wrote: I just wanted to post my info on the subject, even though I dont have 100 hosts on a single machine. We run near 60 hosts on one machine, in 10 instances of tomcat. memory usage has been the biggest problem as our application use cache:ing alot to increase performance. all of those hosts are running fairly complex CMS systems. the computer has 2 Xeon CPUs and 4gigs ram RedHat EAS. The greatest improvement on our memory problem got fixed when we changed the setup of tomcat so that it would not reload contexts and jsp pages. The memory leaks that we had been seeing (ever increasing memory usage of tomcat) stopped. But, in my opinion you should not be seeing some memory problems with 100 hosts (if you have 16g ram). I recomend the usage of several instances of tomcat, but that will be on the cost of memory (one instance seems to use around 30mb (rather basic setup) of ram, even though the profiled usage is alot less), but by doing this you will get way better manageability. I dont think I have to point out the obvious benefits of having several hosts, but one is restarting services will be alot easyer and dealing with all sorts of problems will be easyer. 100 hosts require alot of memory, but everything dependes of course on your application and traffic. This machine is taking on something around 20req/sec average, and the load is (cp from top) load average: 1,08, 1,22, 1,24 But of course cpu power or IO is usually not the bottleneck in java-server-applications. -reynir Niki Ivanchev wrote: God save our apps from any memory leaks. Of course we will test them for this issue. And perform stress testing 20 sounds fair enought. Frankly I don't expect too much traffic per e-shop. Niki Shapira, Yoav wrote: Hi, We have tomcat instances that run ~20 webapps without a problem. Beyond that, we haven't tried, but then again that's why we have tools like JMeter, no? ;) In large part this will depend on the soundness of the application. Especially if it's 100 of the same app, because then each memory leak would be multiplied by 100. Yoav Shapira Millennium Research Informatics -Original Message- From: Niki Ivanchev [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 30, 2004 9:43 AM To: Tomcat User Subject: tomcat performance with 100 webapps Have some one tested Tomcat with more than 100 webapps. For example e-commrece solution, without many bells and whistles - jsut shopbuilder and sopiing cart Each webapp is based on trubine/velocity/torque. Each webapp using it's own firebird database. Can I expect smooth performance on dual xeon with raid controler and lot of RAM (16G) on RedHat EAS? Niki Icygen Co. -- struts 1.1 + tomcat 5.0.16 + java 1.4.2 Linux 2.4.20 Debian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to increase tomcat performance
Hi, I am not Filip, but in my case most hangings were caused by too low settings of Tomcat's maxThreads / maxProcessors or too low setting for the database connections accepted. And as Deepak says he is using Apache in front, I'd also check the Apache, just in case. To check, wait for it to hang, and before stopping tomcat, execute on every machine involved: netstat -n | grep SYN_RECV If you see a large (more than 2-3) quantity of lines there, the involved service (local IP:port) is the blocking one. SYN_SENT would be the counterpart of this. However, as you will not notice the hang immediately, it is unlikely that you see the SYN_SENT. If you do, blocking service is (remote IP:port). Hope that helps. Antonio Fiol Parsons Technical Services wrote: Filip, Does this symptom sound similar to problems with memory leaks? Doug - Original Message - From: Filip Hanik (lists) [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED]; Deepak Hegde [EMAIL PROTECTED] Sent: Saturday, February 14, 2004 11:12 PM Subject: RE: how to increase tomcat performance first go over your configurations, make sure you have enabled enough threads for the connectors (read docs) then get a performance profiler and go to work :) tomcat is pretty optimized, so it could be something in your code Filip -Original Message- From: Deepak Hegde [mailto:[EMAIL PROTECTED] Sent: Saturday, February 14, 2004 8:03 PM To: [EMAIL PROTECTED] Subject: how to increase tomcat performance Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak smime.p7s Description: S/MIME Cryptographic Signature
Re: Re: how to increase tomcat performance
hi, I have checked issuing the same command netstat but it displays nothing. also sometimes tomcat uses 70% of the CPU when this things happen. Regards, Deepak On Sun, 15 Feb 2004 Antonio Fiol Bonnín wrote : Hi, I am not Filip, but in my case most hangings were caused by too low settings of Tomcat's maxThreads / maxProcessors or too low setting for the database connections accepted. And as Deepak says he is using Apache in front, I'd also check the Apache, just in case. To check, wait for it to hang, and before stopping tomcat, execute on every machine involved: netstat -n | grep SYN_RECV If you see a large (more than 2-3) quantity of lines there, the involved service (local IP:port) is the blocking one. SYN_SENT would be the counterpart of this. However, as you will not notice the hang immediately, it is unlikely that you see the SYN_SENT. If you do, blocking service is (remote IP:port). Hope that helps. Antonio Fiol Parsons Technical Services wrote: Filip, Does this symptom sound similar to problems with memory leaks? Doug - Original Message - From: Filip Hanik (lists) [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED]; Deepak Hegde [EMAIL PROTECTED] Sent: Saturday, February 14, 2004 11:12 PM Subject: RE: how to increase tomcat performance first go over your configurations, make sure you have enabled enough threads for the connectors (read docs) then get a performance profiler and go to work :) tomcat is pretty optimized, so it could be something in your code Filip -Original Message- From: Deepak Hegde [mailto:[EMAIL PROTECTED] Sent: Saturday, February 14, 2004 8:03 PM To: [EMAIL PROTECTED] Subject: how to increase tomcat performance Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak
how to increase tomcat performance
Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak
RE: how to increase tomcat performance
first go over your configurations, make sure you have enabled enough threads for the connectors (read docs) then get a performance profiler and go to work :) tomcat is pretty optimized, so it could be something in your code Filip -Original Message- From: Deepak Hegde [mailto:[EMAIL PROTECTED] Sent: Saturday, February 14, 2004 8:03 PM To: [EMAIL PROTECTED] Subject: how to increase tomcat performance Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.577 / Virus Database: 366 - Release Date: 2/3/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.577 / Virus Database: 366 - Release Date: 2/3/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to increase tomcat performance
Filip, Does this symptom sound similar to problems with memory leaks? Doug - Original Message - From: Filip Hanik (lists) [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED]; Deepak Hegde [EMAIL PROTECTED] Sent: Saturday, February 14, 2004 11:12 PM Subject: RE: how to increase tomcat performance first go over your configurations, make sure you have enabled enough threads for the connectors (read docs) then get a performance profiler and go to work :) tomcat is pretty optimized, so it could be something in your code Filip -Original Message- From: Deepak Hegde [mailto:[EMAIL PROTECTED] Sent: Saturday, February 14, 2004 8:03 PM To: [EMAIL PROTECTED] Subject: how to increase tomcat performance Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.577 / Virus Database: 366 - Release Date: 2/3/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.577 / Virus Database: 366 - Release Date: 2/3/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat performance
Hi all. I am wondering about Tomcat performance on different platforms. Any 1 know which is best / figures, running a standard Java webapp, nothing fancy (with JTOpen to an iSeries DB if this makes any difference - looking for 1200 users) ??? Tomcat 5.0.18 on Win2k, Linux (Intel desktop / Xeon / AMD64) Sun (Linux / Solaris) Opinions are appreciated ! Pete. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. *** For any information on the Quinn Group of Companies please visit :- http://www.quinn-group.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance
on xp the curent process whit tomcat is process 28 uc 3 to 10% dedicated charge 213 mo [EMAIL PROTECTED] administrateur http://entre-nous.qc.tc From: Pete Stokes [EMAIL PROTECTED] Reply-To: Tomcat Users List [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Subject: Tomcat performance Date: Fri, 30 Jan 2004 14:33:40 + Hi all. I am wondering about Tomcat performance on different platforms. Any 1 know which is best / figures, running a standard Java webapp, nothing fancy (with JTOpen to an iSeries DB if this makes any difference - looking for 1200 users) ??? Tomcat 5.0.18 on Win2k, Linux (Intel desktop / Xeon / AMD64) Sun (Linux / Solaris) Opinions are appreciated ! Pete. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. *** For any information on the Quinn Group of Companies please visit :- http://www.quinn-group.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] _ MSN Messenger : discutez en direct avec vos amis ! http://messenger.fr.msn.ca/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance
Howdy, I'll give my stock opinion: any benchmarks given to you by others are at best interesting and at worst misleading, the latter being far more likely. There's no such thing as a standard webapp, and you have to benchmark your own webapp against your own expected user load. Yoav Shapira Millennium ChemInformatics -Original Message- From: Pete Stokes [mailto:[EMAIL PROTECTED] Sent: Friday, January 30, 2004 9:34 AM To: Tomcat Users List Subject: Tomcat performance Hi all. I am wondering about Tomcat performance on different platforms. Any 1 know which is best / figures, running a standard Java webapp, nothing fancy (with JTOpen to an iSeries DB if this makes any difference - looking for 1200 users) ??? Tomcat 5.0.18 on Win2k, Linux (Intel desktop / Xeon / AMD64) Sun (Linux / Solaris) Opinions are appreciated ! Pete. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. *** For any information on the Quinn Group of Companies please visit :- http://www.quinn-group.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance
I'm planning on running a new set of benchmarks in a week or two if you can wait that long. JMeter is getting ready to release 2.0 with quite a few enhancements, so I plan on load testing the latest Tomcat5 with JMeter 2.0. my plan of attack right now is to update my old addressbook webapp with an application context, update/delete features and caching. then I will throw major load at it for 48hrs generating a couple million page views. as usual, I will publish the results when I am done on the mailing list. peter lin Pete Stokes [EMAIL PROTECTED] wrote: Hi all. I am wondering about Tomcat performance on different platforms. Any 1 know which is best / figures, running a standard Java webapp, nothing fancy (with JTOpen to an iSeries DB if this makes any difference - looking for 1200 users) ??? Tomcat 5.0.18 on Win2k, Linux (Intel desktop / Xeon / AMD64) Sun (Linux / Solaris) Opinions are appreciated ! Pete. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. *** For any information on the Quinn Group of Companies please visit :- http://www.quinn-group.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it!
Re: Tomcat performance
Hi all! Peter Lin wrote: then I will throw major load at it for 48hrs generating a couple million page views. Just out of curiosity: what is the best way to generate page views for such a benchmark? What tools do you use? Thanks Phil - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance
Howdy, Peter Lin wrote: then I will throw major load at it for 48hrs generating a couple million page views. Just out of curiosity: what is the best way to generate page views for such a benchmark? What tools do you use? JMeter, as he mentioned. He's also its main developer, and it's a great tool -- I use it all the time. Yoav Shapira This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance
Thinking more about people experiences running their bits on different os's etc, if they got much better results with a different combination etc. Pete. Shapira, Yoav wrote: Howdy, I'll give my stock opinion: any benchmarks given to you by others are at best interesting and at worst misleading, the latter being far more likely. There's no such thing as a standard webapp, and you have to benchmark your own webapp against your own expected user load. Yoav Shapira Millennium ChemInformatics -Original Message- From: Pete Stokes [mailto:[EMAIL PROTECTED] Sent: Friday, January 30, 2004 9:34 AM To: Tomcat Users List Subject: Tomcat performance Hi all. I am wondering about Tomcat performance on different platforms. Any 1 know which is best / figures, running a standard Java webapp, nothing fancy (with JTOpen to an iSeries DB if this makes any difference - looking for 1200 users) ??? Tomcat 5.0.18 on Win2k, Linux (Intel desktop / Xeon / AMD64) Sun (Linux / Solaris) Opinions are appreciated ! Pete. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. *** For any information on the Quinn Group of Companies please visit :- http://www.quinn-group.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. *** For any information on the Quinn Group of Companies please visit :- http://www.quinn-group.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance
well I'm really the main developer. right now sebastian and jordi are far more active than I am. I'm responsible for the webservice and accesslog samplers. I wrote the accesslog sampler to do simulation testing using production access logs. it parses common log format and generates requests. peter ln Shapira, Yoav [EMAIL PROTECTED] wrote: Howdy, Peter Lin wrote: then I will throw major load at it for 48hrs generating a couple million page views. Just out of curiosity: what is the best way to generate page views for such a benchmark? What tools do you use? JMeter, as he mentioned. He's also its main developer, and it's a great tool -- I use it all the time. Yoav Shapira This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it!
Re: Tomcat performance
did you read the performance article on the resources page? Remy and I compared windows, linux and solaris. while it is far from comprehensive, it's better than nothing. if someone donates an IBM iSeries, I'll gladly run a ton of benchmarks and publish them :) peter lin Pete Stokes [EMAIL PROTECTED] wrote: Thinking more about people experiences running their bits on different os's etc, if they got much better results with a different combination etc. Pete. Shapira, Yoav wrote: Howdy, I'll give my stock opinion: any benchmarks given to you by others are at best interesting and at worst misleading, the latter being far more likely. There's no such thing as a standard webapp, and you have to benchmark your own webapp against your own expected user load. Yoav Shapira Millennium ChemInformatics -Original Message- From: Pete Stokes [mailto:[EMAIL PROTECTED] Sent: Friday, January 30, 2004 9:34 AM To: Tomcat Users List Subject: Tomcat performance Hi all. I am wondering about Tomcat performance on different platforms. Any 1 know which is best / figures, running a standard Java webapp, nothing fancy (with JTOpen to an iSeries DB if this makes any difference - looking for 1200 users) ??? Tomcat 5.0.18 on Win2k, Linux (Intel desktop / Xeon / AMD64) Sun (Linux / Solaris) Opinions are appreciated ! Pete. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. *** For any information on the Quinn Group of Companies please visit :- http://www.quinn-group.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. *** For any information on the Quinn Group of Companies please visit :- http://www.quinn-group.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it!
RE: Tomcat performance
doh! typo. that should a big fat NOT. as in I'm NOT the main developer. peter lin Peter Lin [EMAIL PROTECTED] wrote: well I'm really the main developer. right now sebastian and jordi are far more active than I am. I'm responsible for the webservice and accesslog samplers. I wrote the accesslog sampler to do simulation testing using production access logs. it parses common log format and generates requests. peter ln - Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it!
Re: Tomcat performance
well I'm biased, since I'm a commiter on JMeter. JMeter is a jakarta project and it has quite a few features in the latest version. JMeter now supports proxies, cookie management, header management, default parameters, ftp protocol, jdbc protocol, java sampler, webservice, soap/xml-rpc, and accesslog sampler. anyway, it has lots of features, just look at the jmeter page. peter lin Philipp Taprogge [EMAIL PROTECTED] wrote: Hi all! Peter Lin wrote: then I will throw major load at it for 48hrs generating a couple million page views. Just out of curiosity: what is the best way to generate page views for such a benchmark? What tools do you use? Thanks Phil - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it!
Re: Tomcat performance on Windows versus Linux
David Rees [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Not enough difference to make it a deciding factor between the two platforms. IMO, Tim's criteria are spot on when deciding what platform to deploy on. Personally, I prefer Unix as I find it easier to setup and administer. Of course, the majority of my experience with Tomcat is on Unix, and not on Windows. That's fine. I never disagreed with Tim's reasons to choose one platform over another. But, as I have already responded, I am not choosing a platform on which to deploy my application; so, arguments as to which platform is better are moot. If you haven't looked already, have a look at the Volano benchmarks (google for it) for some numbers on the scalability and performance of different JVM, but note that those numbers won't necessarily reflect the performance of YOUR application running on Tomcat. Thanks for this tidbit. It is still very early in the process, but scalability of JVMs is definitely of interest to me. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance on Windows versus Linux
I am about to setup Tomcat under a new Linux 2.6 kernel with 2 Athlon MP processors. Since scheduling, threading, and SMP have been much improved in the new kernel I wonder if it will add to performance. I don't have anything to test the new setup with, but if anyone has good ideas (and by good, I mean easy), as I haven't done any profiling, etc. Oscar http://daydream.stanford.edu/tomcat/install_web_services.html On Mon, 15 Dec 2003, Sean Dockery wrote: Thanks, Tim, for the even handed response. I'm not looking for a business case to choose one or the other, however; it is certain that our customers will be deploying our application on both Linux and Windows (and even Solaris). I'm just looking to find out whether or not OS service (TCP/IP stacks, threads, file I/O, etc...) implementation differences between Linux and Windows have a significant impact on performance and thus should be weighed accordingly. I received a response in email from Peter Lin in which he details his experience (which was very helpful; thank you, Peter). I've read Peter's article about performance tuning and a few other white papers as well, but I haven't really seen anything in the past that focused on OS differences and how those differences might affect the recommended approach to profiling and tuning. My conclusions from my readings so far: Slow java code (i.e.: algorithms) will be slow on any platform; change the implementation to make it faster. Configurable behaviour dependent upon OS services (TCP/IP stacks, threads, file I/O, etc...) should be tuned for the platform on which the application will live. PS: I was sad to learn that the Tomcat Performance Handbook publishing date would be postponed. I would be thrilled if either you or Peter could tell me that the book will see a printer's press anytime soon. PPS: Is there a wiki for this stuff anywhere? Tim Funk [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] [I hate saying this since its rather very much like flambait but...] If its worth anything, I haven't had enough load on any of our apps to know whether Linux or Windows is better. Instead, look at: *** - Maintenance - If your a windows shop - stay windows *** - Debugging - I think troubleshooting is easier on *nix systems (YMMV) - Comfort - If your comfortable with unix concepts - linux might be easier than windows -Tim Sean Dockery wrote: I am planning to profile a web application on Windows XP (my development platform). I am curious as to whether or not different components in Tomcat and the JVM will behave differently (in a relative comparison) on Linux (production platform) than Windows. For example, I have had a person tell me that threads under Linux are more performant than threads under Windows--leading to the corollary that web applications under Linux are more performant than web applications under Windows on the same hardware. My guess is that this claim is based upon the supposition that thread/context switches under Linux are faster than under Windows. I find the claim rather dubious because I've never seen data to support the claim, but doubt is not certainty. Is there any evidence that this claim and other component performance differences between the Windows and Linux platform exist and are significant enough to throw my performance measurements out the window. :-) My concern is that I'll profile the application under Windows and tune it, but then find that my gains aren't as significant or maybe even worthless under Linux. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat performance on Windows versus Linux
I am planning to profile a web application on Windows XP (my development platform). I am curious as to whether or not different components in Tomcat and the JVM will behave differently (in a relative comparison) on Linux (production platform) than Windows. For example, I have had a person tell me that threads under Linux are more performant than threads under Windows--leading to the corollary that web applications under Linux are more performant than web applications under Windows on the same hardware. My guess is that this claim is based upon the supposition that thread/context switches under Linux are faster than under Windows. I find the claim rather dubious because I've never seen data to support the claim, but doubt is not certainty. Is there any evidence that this claim and other component performance differences between the Windows and Linux platform exist and are significant enough to throw my performance measurements out the window. :-) My concern is that I'll profile the application under Windows and tune it, but then find that my gains aren't as significant or maybe even worthless under Linux. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance on Windows versus Linux
[I hate saying this since its rather very much like flambait but...] If its worth anything, I haven't had enough load on any of our apps to know whether Linux or Windows is better. Instead, look at: *** - Maintenance - If your a windows shop - stay windows *** - Debugging - I think troubleshooting is easier on *nix systems (YMMV) - Comfort - If your comfortable with unix concepts - linux might be easier than windows -Tim Sean Dockery wrote: I am planning to profile a web application on Windows XP (my development platform). I am curious as to whether or not different components in Tomcat and the JVM will behave differently (in a relative comparison) on Linux (production platform) than Windows. For example, I have had a person tell me that threads under Linux are more performant than threads under Windows--leading to the corollary that web applications under Linux are more performant than web applications under Windows on the same hardware. My guess is that this claim is based upon the supposition that thread/context switches under Linux are faster than under Windows. I find the claim rather dubious because I've never seen data to support the claim, but doubt is not certainty. Is there any evidence that this claim and other component performance differences between the Windows and Linux platform exist and are significant enough to throw my performance measurements out the window. :-) My concern is that I'll profile the application under Windows and tune it, but then find that my gains aren't as significant or maybe even worthless under Linux. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance on Windows versus Linux
Thanks, Tim, for the even handed response. I'm not looking for a business case to choose one or the other, however; it is certain that our customers will be deploying our application on both Linux and Windows (and even Solaris). I'm just looking to find out whether or not OS service (TCP/IP stacks, threads, file I/O, etc...) implementation differences between Linux and Windows have a significant impact on performance and thus should be weighed accordingly. I received a response in email from Peter Lin in which he details his experience (which was very helpful; thank you, Peter). I've read Peter's article about performance tuning and a few other white papers as well, but I haven't really seen anything in the past that focused on OS differences and how those differences might affect the recommended approach to profiling and tuning. My conclusions from my readings so far: Slow java code (i.e.: algorithms) will be slow on any platform; change the implementation to make it faster. Configurable behaviour dependent upon OS services (TCP/IP stacks, threads, file I/O, etc...) should be tuned for the platform on which the application will live. PS: I was sad to learn that the Tomcat Performance Handbook publishing date would be postponed. I would be thrilled if either you or Peter could tell me that the book will see a printer's press anytime soon. PPS: Is there a wiki for this stuff anywhere? Tim Funk [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] [I hate saying this since its rather very much like flambait but...] If its worth anything, I haven't had enough load on any of our apps to know whether Linux or Windows is better. Instead, look at: *** - Maintenance - If your a windows shop - stay windows *** - Debugging - I think troubleshooting is easier on *nix systems (YMMV) - Comfort - If your comfortable with unix concepts - linux might be easier than windows -Tim Sean Dockery wrote: I am planning to profile a web application on Windows XP (my development platform). I am curious as to whether or not different components in Tomcat and the JVM will behave differently (in a relative comparison) on Linux (production platform) than Windows. For example, I have had a person tell me that threads under Linux are more performant than threads under Windows--leading to the corollary that web applications under Linux are more performant than web applications under Windows on the same hardware. My guess is that this claim is based upon the supposition that thread/context switches under Linux are faster than under Windows. I find the claim rather dubious because I've never seen data to support the claim, but doubt is not certainty. Is there any evidence that this claim and other component performance differences between the Windows and Linux platform exist and are significant enough to throw my performance measurements out the window. :-) My concern is that I'll profile the application under Windows and tune it, but then find that my gains aren't as significant or maybe even worthless under Linux. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance on Windows versus Linux
On Mon, December 15, 2003 at 9:42 am, Sean Dockery wrote: Tim Funk [EMAIL PROTECTED] wrote in message: [I hate saying this since its rather very much like flambait but...] If its worth anything, I haven't had enough load on any of our apps to know whether Linux or Windows is better. Instead, look at: *** - Maintenance - If your a windows shop - stay windows *** - Debugging - I think troubleshooting is easier on *nix systems (YMMV) - Comfort - If your comfortable with unix concepts - linux might be easier than windows Thanks, Tim, for the even handed response. I'm not looking for a business case to choose one or the other, however; it is certain that our customers will be deploying our application on both Linux and Windows (and even Solaris). I'm just looking to find out whether or not OS service (TCP/IP stacks, threads, file I/O, etc...) implementation differences between Linux and Windows have a significant impact on performance and thus should be weighed accordingly. Not enough difference to make it a deciding factor between the two platforms. IMO, Tim's criteria are spot on when deciding what platform to deploy on. Personally, I prefer Unix as I find it easier to setup and administer. Of course, the majority of my experience with Tomcat is on Unix, and not on Windows. If you haven't looked already, have a look at the Volano benchmarks (google for it) for some numbers on the scalability and performance of different JVM, but note that those numbers won't necessarily reflect the performance of YOUR application running on Tomcat. My conclusions from my readings so far: Slow java code (i.e.: algorithms) will be slow on any platform; change the implementation to make it faster. Configurable behaviour dependent upon OS services (TCP/IP stacks, threads, file I/O, etc...) should be tuned for the platform on which the application will live. I think you've got the idea. -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Glen: One more item to include in Tomcat performance presentations
I have been looking through the ApacheCon Tomcat performance
presentation while simultaneously working on a performance / memory
problem with Tomcat 4.x, and I have one more item that I would add to
the presentation:
Make sure JSP pages that do not deal with the session have %@ page
session=false % in them. Consider the following brain-dead JSP:
html
body
All the numbers from 0 to 100.br /
%
for (int i=0; i 100; i++)
{
out.println(i + , );
}
out.println(100);
%
/body
/html
Jasper generates the following:
public void _jspService(HttpServletRequest request,
HttpServletResponse response)
throws java.io.IOException, ServletException {
...
HttpSession session = null;
...
pageContext = _jspxFactory.getPageContext(this, request,
response,
null, true, 8192, true);
session = pageContext.getSession();
...
Here the session object is totally unneccessary (both in the
getSession, and in the 3rd-to-last, true argument ot the
getPageContext call). Creating a session adds to the latency of the
request, and worse(in my case, doing some load-testing), adds memory
that is not freed up until the session timeout expires - 30 minutes by
default, possibly creating a situation where the memory is maxed out on
the JVM process.
Hitting very simple JSPs on my system (600Mhz Single proc machine
-Xmx256m, 75 processors going directly to 8080), caused about a 25%
performance gain (~515 req/s up to ~640 req/s) Very significant.
I just thought it worth passing on since it seems useful and (AFAIK) is
not mentioned anywhere in docs.
Jeff Tulley ([EMAIL PROTECTED])
(801)861-5322
Novell, Inc., The Leading Provider of Net Business Solutions
http://www.novell.com
-
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RE: Tomcat performance issues with W2k - SP4
Howdy, Ask Microsoft. Yoav Shapira Millennium ChemInformatics -Original Message- From: Wade Chandler [mailto:[EMAIL PROTECTED] Sent: Monday, October 06, 2003 8:37 AM To: 'Tomcat Users List' Subject: RE: Tomcat performance issues with W2k - SP4 Tomcat isn't the only application. IIS suffers as well. Are you using Server or Advanced Server? There are some major problems with Advanced Server after installing the patch. I think you should ask MS about this. Also check with your VM manufacturer. We have some ISAPI applications that run in IIS that have suffered as well. We are working with MS currently to try and figure this out. Wade -Original Message- From: Benito Garcia [mailto:[EMAIL PROTECTED] Sent: Monday, October 06, 2003 8:03 AM To: Subject: Tomcat performance issues with W2k - SP4 Hello. I have Tomcat 4.0.4 in a Windows 2000 SP3 ( and a Oracle DataBase ) working fine and with good performance. When installing the Service Pack 4 in the Windows 2000, all continue working OK, but wit a great loss of performance. If I uninstall the SP4, the performance remains degraded. I need re-install Windows 2000 - SP3 in order to get good performance again. I'm a little bit confused... Tanks in advance. Benito. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat performance issues with W2k - SP4
Hello. I have Tomcat 4.0.4 in a Windows 2000 SP3 ( and a Oracle DataBase ) working fine and with good performance. When installing the Service Pack 4 in the Windows 2000, all continue working OK, but wit a great loss of performance. If I uninstall the SP4, the performance remains degraded. I need re-install Windows 2000 - SP3 in order to get good performance again. I'm a little bit confused... Tanks in advance. Benito. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat performance issues with W2k - SP4
My machine too have this problem. Any solutions. I am using JDK 1.4.1 , Tomcat 4.1.27 and Oracle 8i. - Original Message - From: Benito Garcia [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Monday, October 06, 2003 5:33 PM Subject: Tomcat performance issues with W2k - SP4 Hello. I have Tomcat 4.0.4 in a Windows 2000 SP3 ( and a Oracle DataBase ) working fine and with good performance. When installing the Service Pack 4 in the Windows 2000, all continue working OK, but wit a great loss of performance. If I uninstall the SP4, the performance remains degraded. I need re-install Windows 2000 - SP3 in order to get good performance again. I'm a little bit confused... Tanks in advance. Benito. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat performance issues with W2k - SP4
Tomcat isn't the only application. IIS suffers as well. Are you using Server or Advanced Server? There are some major problems with Advanced Server after installing the patch. I think you should ask MS about this. Also check with your VM manufacturer. We have some ISAPI applications that run in IIS that have suffered as well. We are working with MS currently to try and figure this out. Wade -Original Message- From: Benito Garcia [mailto:[EMAIL PROTECTED] Sent: Monday, October 06, 2003 8:03 AM To: Subject: Tomcat performance issues with W2k - SP4 Hello. I have Tomcat 4.0.4 in a Windows 2000 SP3 ( and a Oracle DataBase ) working fine and with good performance. When installing the Service Pack 4 in the Windows 2000, all continue working OK, but wit a great loss of performance. If I uninstall the SP4, the performance remains degraded. I need re-install Windows 2000 - SP3 in order to get good performance again. I'm a little bit confused... Tanks in advance. Benito. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: article on tomcat performance
PDF and/or html - how about hosting? Has Jakarta offered to host - they really should but I they refuse, please let me know - Original Message - From: Peter Lin [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Monday, September 22, 2003 3:44 AM Subject: Re: article on tomcat performance Here is a quick update. I plan to release the finished article thursday or friday. tim and mike were kind enough to review it. I'm still waiting for the other reviewers. My question is what format would people like? word openoffice pdf peter Peter Lin [EMAIL PROTECTED] wrote: It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: article on tomcat performance
PDF. Then its one document which will look the same everywhere. I prefer not to use Office documents for cross company transmission since I can't trust the other party sending me a virus free document. (Even if my security settings are high) -Tim Peter Lin wrote: Here is a quick update. I plan to release the finished article thursday or friday. tim and mike were kind enough to review it. I'm still waiting for the other reviewers. My question is what format would people like? word openoffice pdf peter - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: article on tomcat performance
--- Peter Lin [EMAIL PROTECTED] wrote: Here is a quick update. I plan to release the finished article thursday or friday. tim and mike were kind enough to review it. I'm still waiting for the other reviewers. My question is what format would people like? word openoffice pdf peter Anything other than PDF. EKMacAdie __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: article on tomcat performance
Here is a quick update. I plan to release the finished article thursday or friday. tim and mike were kind enough to review it. I'm still waiting for the other reviewers. My question is what format would people like? word openoffice pdf peter Peter Lin [EMAIL PROTECTED] wrote: It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software
RE: article on tomcat performance
PDF -Original Message- From: Peter Lin [mailto:[EMAIL PROTECTED] Sent: Sunday, September 21, 2003 8:44 PM To: Tomcat Users List Subject: Re: article on tomcat performance Here is a quick update. I plan to release the finished article thursday or friday. tim and mike were kind enough to review it. I'm still waiting for the other reviewers. My question is what format would people like? word openoffice pdf peter Peter Lin [EMAIL PROTECTED] wrote: It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: article on tomcat performance
Seconded, otherwise please include me in review distribution. -Original Message- From: srinath narasimhan [mailto:[EMAIL PROTECTED] Sent: 17 September 2003 18:47 To: Tomcat Users List Subject: RE: article on tomcat performance Please post it to the list with a link or how to get it. Thanks. -Original Message- From: Micael [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 17, 2003 10:57 To: Tomcat Users List Subject: Re: article on tomcat performance Also, YES At 08:59 AM 9/17/2003 +0200, you wrote: YES - Original Message - From: Peter Lin [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, September 17, 2003 5:17 AM Subject: article on tomcat performance It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] LEGAL NOTICE This electronic mail transmission and any accompanying documents contain information belonging to the sender which may be confidential and legally privileged. This information is intended only for the use of the individual or entity to whom this electronic mail transmission was sent as indicated above. If you are not the intended recipient, any disclosure, copying, distribution, or action taken in reliance on the contents of the information contained in this transmission is strictly prohibited. If you have received this transmission in error, please delete the message. Thank you - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: article on tomcat performance
YES - Original Message - From: Peter Lin [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, September 17, 2003 5:17 AM Subject: article on tomcat performance It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: article on tomcat performance
As long as you send us all the link to the finished article, I'm sure I won't mind missing the 'beta'. ;) -Original Message- From: Peter Lin [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 16, 2003 10:17 PM To: Tomcat Users List Subject: article on tomcat performance It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: article on tomcat performance
Also, YES At 08:59 AM 9/17/2003 +0200, you wrote: YES - Original Message - From: Peter Lin [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, September 17, 2003 5:17 AM Subject: article on tomcat performance It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] LEGAL NOTICE This electronic mail transmission and any accompanying documents contain information belonging to the sender which may be confidential and legally privileged. This information is intended only for the use of the individual or entity to whom this electronic mail transmission was sent as indicated above. If you are not the intended recipient, any disclosure, copying, distribution, or action taken in reliance on the contents of the information contained in this transmission is strictly prohibited. If you have received this transmission in error, please delete the message. Thank you - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: article on tomcat performance
Please post it to the list with a link or how to get it. Thanks. -Original Message- From: Micael [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 17, 2003 10:57 To: Tomcat Users List Subject: Re: article on tomcat performance Also, YES At 08:59 AM 9/17/2003 +0200, you wrote: YES - Original Message - From: Peter Lin [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, September 17, 2003 5:17 AM Subject: article on tomcat performance It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] LEGAL NOTICE This electronic mail transmission and any accompanying documents contain information belonging to the sender which may be confidential and legally privileged. This information is intended only for the use of the individual or entity to whom this electronic mail transmission was sent as indicated above. If you are not the intended recipient, any disclosure, copying, distribution, or action taken in reliance on the contents of the information contained in this transmission is strictly prohibited. If you have received this transmission in error, please delete the message. Thank you - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
article on tomcat performance
It looks like the tomcat performance book probably won't happen, so I am writing a short article based on some of the benchmark results. I should have a draft done in a week. Anyone interested in reviewing it? peter lin - Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software
Re: Apache Tomcat Performance Handbook
That's why...they're no longer being printed. Anything you see on shelves or in stores is backstock. Peer Information Services, which owned Wrox and several other publishing houses (like Friends of Ed) liquidated in March, 2003. Apress and Wiley picked up most of the assetsthe books that will be supported will be reprinted using Apress and Wiley covers and get a new ISBN. A perfect example of this is Beginning Java Objects by Jacquie Barker...it was a very popular Wrox book, it is now available as an Apress book with a different cover, different typesetting, different editorial team, etc. The content is the same, and the copyright is still 2000. Soif you see a Wrox book at full price, you can probably deal with the seller to get a discount if one isn't already offered. The sad thing is, the authors will never see any of that money, so if you really want to support the authors and encourage similar titles, buy the Apress or Wiley version instead. John Darryl L. Pierce wrote: John Turner wrote: The book was never published. The original publisher (Wrox) went out of business and liquidated assets. Was this recently? Just this past weekend I picked up a Wrox press book (Java Data) and it was 50% off. All of their books at Borders were 50% off. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Apache Tomcat Performance Handbook
The book was never published. The original publisher (Wrox) went out of business and liquidated assets. The rights to the performance handbook (and many other former Wrox titles including the security handbook) were picked up by Apress. The rights to the rest were picked up by Wiley. I think Wiley is running wrox.com right now. From the conversations I've had with Apress, the future of the performance book is undecided, though that could change at any moment. I for one think there is a need for such a book, but with Tomcat 5 coming out, it might need to be rewritten to address the new release. John Flat Juas wrote: Hi! I'm looking for the Apache Tomcat Performance Handbook, but in every shop I check it's out of print. There are no used copies in ebay neither. Where can I get a copy of this book (I don't mind if it's a used one) or buy a pdf version of it ? Can you recommend me other books about tomcat performance or guide me to online resources about this subject ? Thanks in advance __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Apache Tomcat Performance Handbook
How could Wrox go out of business? That doesn't sound right. They have 1001 titles and write great books! Are you sure? --- John Turner [EMAIL PROTECTED] wrote: The book was never published. The original publisher (Wrox) went out of business and liquidated assets. The rights to the performance handbook (and many other former Wrox titles including the security handbook) were picked up by Apress. The rights to the rest were picked up by Wiley. I think Wiley is running wrox.com right now. From the conversations I've had with Apress, the future of the performance book is undecided, though that could change at any moment. I for one think there is a need for such a book, but with Tomcat 5 coming out, it might need to be rewritten to address the new release. John Flat Juas wrote: Hi! I'm looking for the Apache Tomcat Performance Handbook, but in every shop I check it's out of print. There are no used copies in ebay neither. Where can I get a copy of this book (I don't mind if it's a used one) or buy a pdf version of it ? Can you recommend me other books about tomcat performance or guide me to online resources about this subject ? Thanks in advance __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Apache Tomcat Performance Handbook
Howdy, Just google for wrox out of business -- both the normal and sponsored search results tell the tale... Yoav Shapira Millennium ChemInformatics -Original Message- From: Matt Fury [mailto:[EMAIL PROTECTED] Sent: Thursday, September 04, 2003 9:44 AM To: Tomcat Users List Subject: Re: Apache Tomcat Performance Handbook How could Wrox go out of business? That doesn't sound right. They have 1001 titles and write great books! Are you sure? --- John Turner [EMAIL PROTECTED] wrote: The book was never published. The original publisher (Wrox) went out of business and liquidated assets. The rights to the performance handbook (and many other former Wrox titles including the security handbook) were picked up by Apress. The rights to the rest were picked up by Wiley. I think Wiley is running wrox.com right now. From the conversations I've had with Apress, the future of the performance book is undecided, though that could change at any moment. I for one think there is a need for such a book, but with Tomcat 5 coming out, it might need to be rewritten to address the new release. John Flat Juas wrote: Hi! I'm looking for the Apache Tomcat Performance Handbook, but in every shop I check it's out of print. There are no used copies in ebay neither. Where can I get a copy of this book (I don't mind if it's a used one) or buy a pdf version of it ? Can you recommend me other books about tomcat performance or guide me to online resources about this subject ? Thanks in advance __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Apache Tomcat Performance Handbook
Well, I guess we have to be more clear. Wrox did not go out of business. Peer Information Services did. Wrox was just one of many names that Peer used to publish materials. So, while there were lots of titles and lots of great Wrox books, that is separate from whether the company called Peer Information Services was managed efficiently and wisely. I'm no MBA, but if I were to call it, I would say it was a simple matter of too big, too many, too fast. They had offices in three countries (England, India, and US), lots of people, and lots of hurry up and wait. The overhead of managing all those titles had to be huge, and I can tell you from firsthand experience that every book probably had 30 or 40 people involved (counting the authors) in getting it to press. For example, my contract was FedEx'd back and forth to India twice. Not a lot of money, but 3-6 authors per title and several hundred titles and it starts to add up. Even something as niche-oriented as the security handbook I worked on had 18 people and 5 authors for about 225 pages. Without going into specifics, I can also say that Peer's royalty schedule was pretty poor in comparison to other publishers, so in that light they should have had more money to work with than one of the other companies, but apparently that didn't make a difference. John Matt Fury wrote: How could Wrox go out of business? That doesn't sound right. They have 1001 titles and write great books! Are you sure? --- John Turner [EMAIL PROTECTED] wrote: The book was never published. The original publisher (Wrox) went out of business and liquidated assets. The rights to the performance handbook (and many other former Wrox titles including the security handbook) were picked up by Apress. The rights to the rest were picked up by Wiley. I think Wiley is running wrox.com right now. From the conversations I've had with Apress, the future of the performance book is undecided, though that could change at any moment. I for one think there is a need for such a book, but with Tomcat 5 coming out, it might need to be rewritten to address the new release. John Flat Juas wrote: Hi! I'm looking for the Apache Tomcat Performance Handbook, but in every shop I check it's out of print. There are no used copies in ebay neither. Where can I get a copy of this book (I don't mind if it's a used one) or buy a pdf version of it ? Can you recommend me other books about tomcat performance or guide me to online resources about this subject ? Thanks in advance __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Apache Tomcat Performance Handbook
Also, while the Wrox side of the business seemed to be thriving, there were several other publishing arms that may not have been doing much more than soaking up profits with little return. As I said, Wrox was just one of many publishing names used by Peer. John John Turner wrote: Well, I guess we have to be more clear. Wrox did not go out of business. Peer Information Services did. Wrox was just one of many names that Peer used to publish materials. So, while there were lots of titles and lots of great Wrox books, that is separate from whether the company called Peer Information Services was managed efficiently and wisely. I'm no MBA, but if I were to call it, I would say it was a simple matter of too big, too many, too fast. They had offices in three countries (England, India, and US), lots of people, and lots of hurry up and wait. The overhead of managing all those titles had to be huge, and I can tell you from firsthand experience that every book probably had 30 or 40 people involved (counting the authors) in getting it to press. For example, my contract was FedEx'd back and forth to India twice. Not a lot of money, but 3-6 authors per title and several hundred titles and it starts to add up. Even something as niche-oriented as the security handbook I worked on had 18 people and 5 authors for about 225 pages. Without going into specifics, I can also say that Peer's royalty schedule was pretty poor in comparison to other publishers, so in that light they should have had more money to work with than one of the other companies, but apparently that didn't make a difference. John Matt Fury wrote: How could Wrox go out of business? That doesn't sound right. They have 1001 titles and write great books! Are you sure? --- John Turner [EMAIL PROTECTED] wrote: The book was never published. The original publisher (Wrox) went out of business and liquidated assets. The rights to the performance handbook (and many other former Wrox titles including the security handbook) were picked up by Apress. The rights to the rest were picked up by Wiley. I think Wiley is running wrox.com right now. From the conversations I've had with Apress, the future of the performance book is undecided, though that could change at any moment. I for one think there is a need for such a book, but with Tomcat 5 coming out, it might need to be rewritten to address the new release. John Flat Juas wrote: Hi! I'm looking for the Apache Tomcat Performance Handbook, but in every shop I check it's out of print. There are no used copies in ebay neither. Where can I get a copy of this book (I don't mind if it's a used one) or buy a pdf version of it ? Can you recommend me other books about tomcat performance or guide me to online resources about this subject ? Thanks in advance __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Apache Tomcat Performance Handbook
Jeez, the stuff you learn on this list... -Original Message- From: John Turner [mailto:[EMAIL PROTECTED] Sent: 04 September 2003 15:02 To: Tomcat Users List Subject: Re: Apache Tomcat Performance Handbook Well, I guess we have to be more clear. Wrox did not go out of business. Peer Information Services did. Wrox was just one of many names that Peer used to publish materials. So, while there were lots of titles and lots of great Wrox books, that is separate from whether the company called Peer Information Services was managed efficiently and wisely. I'm no MBA, but if I were to call it, I would say it was a simple matter of too big, too many, too fast. They had offices in three countries (England, India, and US), lots of people, and lots of hurry up and wait. The overhead of managing all those titles had to be huge, and I can tell you from firsthand experience that every book probably had 30 or 40 people involved (counting the authors) in getting it to press. For example, my contract was FedEx'd back and forth to India twice. Not a lot of money, but 3-6 authors per title and several hundred titles and it starts to add up. Even something as niche-oriented as the security handbook I worked on had 18 people and 5 authors for about 225 pages. Without going into specifics, I can also say that Peer's royalty schedule was pretty poor in comparison to other publishers, so in that light they should have had more money to work with than one of the other companies, but apparently that didn't make a difference. John Matt Fury wrote: How could Wrox go out of business? That doesn't sound right. They have 1001 titles and write great books! Are you sure? --- John Turner [EMAIL PROTECTED] wrote: The book was never published. The original publisher (Wrox) went out of business and liquidated assets. The rights to the performance handbook (and many other former Wrox titles including the security handbook) were picked up by Apress. The rights to the rest were picked up by Wiley. I think Wiley is running wrox.com right now. From the conversations I've had with Apress, the future of the performance book is undecided, though that could change at any moment. I for one think there is a need for such a book, but with Tomcat 5 coming out, it might need to be rewritten to address the new release. John Flat Juas wrote: Hi! I'm looking for the Apache Tomcat Performance Handbook, but in every shop I check it's out of print. There are no used copies in ebay neither. Where can I get a copy of this book (I don't mind if it's a used one) or buy a pdf version of it ? Can you recommend me other books about tomcat performance or guide me to online resources about this subject ? Thanks in advance __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This email has been scanned for all viruses by the MessageLabs Email Security System. For more information on a proactive email security service working around the clock, around the globe, visit http://www.messagelabs.com This email has been scanned for all viruses by the MessageLabs Email Security System. For more information on a proactive email security service working around the clock, around the globe, visit http://www.messagelabs.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Apache Tomcat Performance Handbook
John Turner wrote: The book was never published. The original publisher (Wrox) went out of business and liquidated assets. The rights to the performance handbook (and many other former Wrox titles including the security handbook) were picked up by Apress. The rights to the rest were picked up by Wiley. I think Wiley is running wrox.com right now. From the conversations I've had with Apress, the future of the performance book is undecided, though that could change at any moment. I for one think there is a need for such a book, but with Tomcat 5 coming out, it might need to be rewritten to address the new release. As the coauthor of the said handbook (which is now indeed relatively out of date), I am quite pissed at Wrox and APress (I still haven't been paid a dime despite recurrent claims from APress for the past 4 months that they'll be coming back to me within a week). So a big thank you to these folks for the nice support to OSS contributors :-D (ok, I'm sarcastic) -- x Rémy Maucherat Senior Developer Consultant JBoss Group (Europe) SàRL x - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Apache Tomcat Performance Handbook
If the book never gets out, I plan to write a 30-50 page paper based on the results of our benchmarks and give it to the TC community. Hopefully it won't go down the drain, since Remy and I spend over 2 months doing a ton of benchmarks with all sorts of variations and tuning options. peter --- Remy Maucherat [EMAIL PROTECTED] wrote: John Turner wrote: The book was never published. The original publisher (Wrox) went out of business and liquidated assets. The rights to the performance handbook (and many other former Wrox titles including the security handbook) were picked up by Apress. The rights to the rest were picked up by Wiley. I think Wiley is running wrox.com right now. From the conversations I've had with Apress, the future of the performance book is undecided, though that could change at any moment. I for one think there is a need for such a book, but with Tomcat 5 coming out, it might need to be rewritten to address the new release. As the coauthor of the said handbook (which is now indeed relatively out of date), I am quite pissed at Wrox and APress (I still haven't been paid a dime despite recurrent claims from APress for the past 4 months that they'll be coming back to me within a week). So a big thank you to these folks for the nice support to OSS contributors :-D (ok, I'm sarcastic) -- x Rémy Maucherat Senior Developer Consultant JBoss Group (Europe) SàRL x - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Apache Tomcat Performance Handbook
Hi! I'm looking for the Apache Tomcat Performance Handbook, but in every shop I check it's out of print. There are no used copies in ebay neither. Where can I get a copy of this book (I don't mind if it's a used one) or buy a pdf version of it ? Can you recommend me other books about tomcat performance or guide me to online resources about this subject ? Thanks in advance __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Apache Tomcat Performance Handbook
The book was never published and Wrox have gone bust, I believe. - Original Message - From: Flat Juas [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, September 03, 2003 10:49 PM Subject: Apache Tomcat Performance Handbook Hi! I'm looking for the Apache Tomcat Performance Handbook, but in every shop I check it's out of print. There are no used copies in ebay neither. Where can I get a copy of this book (I don't mind if it's a used one) or buy a pdf version of it ? Can you recommend me other books about tomcat performance or guide me to online resources about this subject ? Thanks in advance __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat Performance Questions
Howdy, Just wanted to find out what the list's experience is with Tomcat versus Apache ? Why is one preferred over the other ? Depends on your situation. People with lots of static files frequently put Apache in front to handle the static files and delegate servlet/JSP requests to tomcat. I personally prefer a standalone tomat. Is Tomcat used in a production site or just for development ? Used in many production sites. Unfortunately due to the legal realities in many companies of people on this list, you will not be able to get a good list of companies using tomcat in production. I've been arguing the case for Tomcat on an internal project esp. since there are no static pages and the system is using JSP/Java. Then tomcat is probably your choice. If you write you app to the servlet specification, you can easily compare tomcat with other spec-compliant containers for performance and reliability. Just don't have any hard qualitative data. I don't think there IS such a thing as hard qualitative data. Qualitative is kind of like subjective in that way, when applied to server choice and performance data ;) Yoav Shapira Millennium ChemInformatics This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat Performance Questions
Hi Shapira, Is there way to host multiple sites in Tomcat without using apache thanks Laxmikanth -Original Message- From: Shapira, Yoav [SMTP:[EMAIL PROTECTED]] Sent: Friday, February 14, 2003 7:53 PM To: Tomcat Users List Subject: RE: Tomcat Performance Questions Howdy, Just wanted to find out what the list's experience is with Tomcat versus Apache ? Why is one preferred over the other ? Depends on your situation. People with lots of static files frequently put Apache in front to handle the static files and delegate servlet/JSP requests to tomcat. I personally prefer a standalone tomat. Is Tomcat used in a production site or just for development ? Used in many production sites. Unfortunately due to the legal realities in many companies of people on this list, you will not be able to get a good list of companies using tomcat in production. I've been arguing the case for Tomcat on an internal project esp. since there are no static pages and the system is using JSP/Java. Then tomcat is probably your choice. If you write you app to the servlet specification, you can easily compare tomcat with other spec-compliant containers for performance and reliability. Just don't have any hard qualitative data. I don't think there IS such a thing as hard qualitative data. Qualitative is kind of like subjective in that way, when applied to server choice and performance data ;) Yoav Shapira Millennium ChemInformatics This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] * Disclaimer: The information in this e-mail and any attachments is confidential / privileged. It is intended solely for the addressee or addressees. If you are not the addressee indicated in this message, you may not copy or deliver this message to anyone. In such case, you should destroy this message and kindly notify the sender by reply email. Please advise immediately if you or your employer does not consent to Internet email for messages of this kind. * - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
