RE: to many tomcat processes!! AAH!!
which JDK are you using ? Shuklix -Original Message- From: Georges Boutros [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 18, 2001 1:34 AM To: '[EMAIL PROTECTED]' Subject: RE: to many tomcat processes!! AAH!! does anyone know how can i force java to use green threads? thanks -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used green threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. -
Re: to many tomcat processes!! AAH!!
Hei, i use JDK 1.3 Saurabh Shukla wrote: which JDK are you using ? Shuklix -Original Message- From: Georges Boutros [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 18, 2001 1:34 AM To: '[EMAIL PROTECTED]' Subject: RE: to many tomcat processes!! AAH!! does anyone know how can i force java to use green threads? thanks -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used green threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. - -- __ Gruss, Wolle --- [EMAIL PROTECTED]
RE: to many tomcat processes!! AAH!!
ok, open your java file, it is a shell script. (it should be in your JAVA_HOME/bin/ ) look for this line DEFAULT_THREADS_FLAG=native change native to green . ie now the DEFAULT_THREADS_FLAG=green this should do the job. let me know if it does't/does works. Regards, Shuklix -Original Message- From: Wolle [mailto:[EMAIL PROTECTED]] Sent: Monday, April 23, 2001 5:00 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hei, i use JDK 1.3 Saurabh Shukla wrote: which JDK are you using ? Shuklix -Original Message- From: Georges Boutros [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 18, 2001 1:34 AM To: '[EMAIL PROTECTED]' Subject: RE: to many tomcat processes!! AAH!! does anyone know how can i force java to use green threads? thanks -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used green threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. - -- __ Gruss, Wolle --- [EMAIL PROTECTED]
RE: to many tomcat processes!! AAH!!
I do not know why you would want to do this other then for testing but -- change your startup script for tomcat to include the option java -classic and you will be using green threads. Be aware that it is now easier to create a deadlock situation. I believe that it would be a big mistake to deploy a system with green threads. My system incorrectly reports that I am using 217 meg of ram but that is incorrect, It is actually using 74 meg of ram.(with tomcat running) Use gps for a more accurate reading. Pushing the server hard during testing does not increase the ram used significantly. (cpu usage reflects as you would expect) All those processes that you are seeing are simply sleeping threads. They are NOT using any resources and are being incorrectly reported as consuming processes. This is the very compelling reason that you would want to use java in the first place. Native multi-threading. You have a thread pool ready to respond without the overhead of creating new processes on demand. Good luck, Craig Let us know what you find out. -Original Message- From: Wolle [mailto:[EMAIL PROTECTED]] Sent: Monday, April 23, 2001 4:30 AM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hei, i use JDK 1.3 Saurabh Shukla wrote: which JDK are you using ? Shuklix -Original Message- From: Georges Boutros [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 18, 2001 1:34 AM To: '[EMAIL PROTECTED]' Subject: RE: to many tomcat processes!! AAH!! does anyone know how can i force java to use green threads? thanks -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used green threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. - -- __ Gruss, Wolle --- [EMAIL PROTECTED]
RE: to many tomcat processes!! AAH!!
Or you can do try thing also.
open the file $Tomcat_home/bin/tomcat.sh
in there look for the word native , if there is any such thing change it to
green.(this is assuming that your tomcat start script specifies that it is
using native threads)
in the tomcat.sh file, the command line which runs tomcat looks something
like this.
$JAVACMD -native -Xms64M -Xmx128M $TOMCAT_OPTS -Dtomcat.home=${TOMCAT_HOME}
org.apache.tomcat.startup.Tomcat $@
or
make it $JAVACMD -green -Xms64M -Xmx128M
$TOMCAT_OPTS -Dtomcat.home=${TOMCAT_HOME} org.apache.tomcat.startup.Tomcat
$@
to use the green threads.
However too many java process should not be an issue to worry about, coz' in
green threads
all those processes are shown as a part of one process. Infact your
performance might deteriorate because of use of green threads. You can check
out the performance using
green threads and native threads and then decide if to use green or native
threads.
Shuklix
-Original Message-
From: Wolle [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 23, 2001 5:00 PM
To: [EMAIL PROTECTED]
Subject: Re: to many tomcat processes!! AAH!!
Hei,
i use JDK 1.3
Saurabh Shukla wrote:
which JDK are you using ?
Shuklix
-Original Message-
From: Georges Boutros [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, April 18, 2001 1:34 AM
To: '[EMAIL PROTECTED]'
Subject: RE: to many tomcat processes!! AAH!!
does anyone know how can i force java to use green threads?
thanks
-Original Message-
From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]]
Sent: Thursday, April 12, 2001 8:31 PM
To: [EMAIL PROTECTED]
Subject: Re: to many tomcat processes!! AAH!!
Hi,
maybe the many processes are because jdk1.2 and up use native threads
(AFAIK, 1.1 used green threads, i. e. a threading package implemented
in java itself).
With 1.2+, every java thread is a native OS thread and therefor gets
listed by ps. Have you tried forcing java to use green threads? I'm
quite sure that it is possible (RTFM).
--
Best regards,
Ansgar W. Konermann
eMail: [EMAIL PROTECTED]
--- Hello, I am a message footer. -
--
__
Gruss,
Wolle
---
[EMAIL PROTECTED]
Re: to many tomcat processes!! AAH!!
Thanks for all the Information, i don't want to change it in green Threads, I would only knew what's goining on with these Threads , and know I have these Information, thanks a lot ! Greetings, Wolle Craig O'Brien wrote: I do not know why you would want to do this other then for testing but -- change your startup script for tomcat to include the option java -classic and you will be using green threads. Be aware that it is now easier to create a deadlock situation. I believe that it would be a big mistake to deploy a system with green threads. My system incorrectly reports that I am using 217 meg of ram but that is incorrect, It is actually using 74 meg of ram.(with tomcat running) Use gps for a more accurate reading. Pushing the server hard during testing does not increase the ram used significantly. (cpu usage reflects as you would expect) All those processes that you are seeing are simply sleeping threads. They are NOT using any resources and are being incorrectly reported as consuming processes. This is the very compelling reason that you would want to use java in the first place. Native multi-threading. You have a thread pool ready to respond without the overhead of creating new processes on demand. Good luck, Craig Let us know what you find out. -Original Message- From: Wolle [mailto:[EMAIL PROTECTED]] Sent: Monday, April 23, 2001 4:30 AM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hei, i use JDK 1.3 Saurabh Shukla wrote: which JDK are you using ? Shuklix -Original Message- From: Georges Boutros [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 18, 2001 1:34 AM To: '[EMAIL PROTECTED]' Subject: RE: to many tomcat processes!! AAH!! does anyone know how can i force java to use green threads? thanks -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used green threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. -
RE: to many tomcat processes!! AAH!!
Please get me off this list --- Saurabh Shukla [EMAIL PROTECTED] wrote: ok, open your java file, it is a shell script. (it should be in your JAVA_HOME/bin/ ) look for this line DEFAULT_THREADS_FLAG=native change native to green . ie now the DEFAULT_THREADS_FLAG=green this should do the job. let me know if it does't/does works. Regards, Shuklix -Original Message- From: Wolle [mailto:[EMAIL PROTECTED]] Sent: Monday, April 23, 2001 5:00 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hei, i use JDK 1.3 Saurabh Shukla wrote: which JDK are you using ? Shuklix -Original Message- From: Georges Boutros [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 18, 2001 1:34 AM To: '[EMAIL PROTECTED]' Subject: RE: to many tomcat processes!! AAH!! does anyone know how can i force java to use green threads? thanks -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used green threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. - -- __ Gruss, Wolle --- [EMAIL PROTECTED] = If your into Body For Life, check out http://clubs.yahoo.com/clubs/bodyforlifestatenislandny __ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/
RE: to many tomcat processes!! AAH!!
does anyone know how can i force java to use green threads? thanks -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used "green" threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. -
RE: to many tomcat processes!! AAH!!
At 04:03 PM 4/17/01 -0400, you wrote: does anyone know how can i force java to use green threads? thanks I don't know how, but why would you want to do it? The native thread use should be more efficient. The only drawback is the the way that the ps command displays the threads, but it is only a display issue. The threads aren't actually using up all the memory that the ps command output suggests.. Ed -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used "green" threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. -
RE: to many tomcat processes!! AAH!!
Try something like -green (as opposed to -native) as the first command line argument. This is how it works on the bd jdk 1.17 at least. If not, have a look at the $JAVA_HOME/bin/java wrapper, it should have details in there, and probably a way to change the default threading model. Like you, the process lists used to annoy me, but after getting over the initial emotional trauma (!), they became easy to live with. The process lists on some of my boxes are so large anyway that I use 'ps ax|grep whatever' to find processes regardless. Kevin On Tue, 17 Apr 2001, Georges Boutros wrote: does anyone know how can i force java to use green threads? thanks -Original Message- From: Ansgar W. Konermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 8:31 PM To: [EMAIL PROTECTED] Subject: Re: to many tomcat processes!! AAH!! Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used "green" threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. -
RE: to many tomcat processes!! AAH!!
You can use green threads instead of native threads and thou shall see just one process. :-) Shuklix -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of David CrookeSent: Friday, April 13, 2001 9:45 AMTo: [EMAIL PROTECTED]Subject: Re: to many tomcat processes!! AAH!!This is how Linux shows kernel threads; nothing to be alarmed about. There is only one process. "Brendon M. Maragia" wrote: Dear Readers, I finally!!! Got Jakarta Tomcatvhosting with Cocoon and it was soso beautiful andsweet, I jumped around the room screaming in joy.Don't tryan tell me you've never done that.Anyways, I was usingjdk1.1.3 ;]ewww, I know.So I upgraded to j2sdk1.3 and fired everything back up.Low and behold when runningps -aux, I was confronted with this root2806 44.54.1 76632 10580 pts/1S20:010:01 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root28440.04.1 76632 10580 pts/1S20:010:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root28450.04.1 76632 10580 pts/1S20:010:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root28460.04.1 76632 10580 pts/1S20:010:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l Not just that about 50 more.In total about 54 Jakarta Tomcat processes, all this right after I upgraded to j2sdk1.3.I tried downgrading again to jdk1.2.2, no dice same error.I searched through the mail archives and noticed a guy buy the name of Pete Wright had posted a similar error.I emailed him and he told me the list hadn't been much help.So in posting the same error again I hope to raise usersympathy ;]please help! Sincerely, Brendon Maragia
Re: to many tomcat processes!! AAH!!
Read my last post. It tells you where to find the configuration examples. --jeff - Original Message - From: Georges Boutros To: '[EMAIL PROTECTED]' Sent: Friday, April 13, 2001 6:54 AM Subject: RE: to many tomcat processes!! AAH!! hi, how can you configure server.xml ?? Do you have an example about the configuration of PoolTCPConnectors for ajp12 and ajp13 thanks, Georges -Original Message-From: Jeff Kilbride [mailto:[EMAIL PROTECTED]]Sent: Thursday, April 12, 2001 10:10 PMTo: [EMAIL PROTECTED]Subject: Re: to many tomcat processes!! AAH!! Go to the Tomcat User's Guide: http://jakarta.apache.org/tomcat/jakarta-tomcat/src/doc/index.html and do a search for "max_threads". You can configure your PoolTCPConnectors for ajp12 and ajp13 via the server.xml file. BE CAREFUL. If you set these values too low, you will undoubtedly hamper performance. However, you shouldn't leave these at the default values once you understand what they do. In my case, I am using ajp13 in all of my code. ajp12, as far as I know, is only being used for startup/shutdown of Tomcat itself. So, I cut the values way back for ajp12 and increased the defaults for ajp13. Thanks, --jeff - Original Message - From: Brendon M. Maragia To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 5:14 PM Subject: to many tomcat processes!! AAH!! Dear Readers, I finally!!! Got Jakarta Tomcat vhosting with Cocoon and it was so so beautiful and sweet, I jumped around the room screaming in joy. Dont try an tell me youve never done that. Anyways, I was using jdk1.1.3 ;] ewww, I know. So I upgraded to j2sdk1.3 and fired everything back up. Low and behold when running ps aux, I was confronted with this. root 2806 44.5 4.1 76632 10580 pts/1 S 20:01 0:01 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root 2844 0.0 4.1 76632 10580 pts/1 S 20:01 0:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root 2845 0.0 4.1 76632 10580 pts/1 S 20:01 0:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root 2846 0.0 4.1 76632 10580 pts/1 S 20:01 0:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l Not just that about 50 more. In total about 54 Jakarta Tomcat processes, all this right after I upgraded to j2sdk1.3. I tried downgrading again to jdk1.2.2, no dice same error. I searched through the mail archives and noticed a guy buy the name of Pete Wright had posted a similar error. I emailed him and he told me the list hadnt been much help. So in posting the same error again I hope to raise user sympathy ;] please help! Sincerely, Brendon Maragia
Re: to many tomcat processes!! AAH!!
Hi, maybe the many processes are because jdk1.2 and up use native threads (AFAIK, 1.1 used "green" threads, i. e. a threading package implemented in java itself). With 1.2+, every java thread is a native OS thread and therefor gets listed by ps. Have you tried forcing java to use green threads? I'm quite sure that it is possible (RTFM). -- Best regards, Ansgar W. Konermann eMail: [EMAIL PROTECTED] --- Hello, I am a message footer. -
Re: to many tomcat processes!! AAH!!
Go to the Tomcat User's Guide: http://jakarta.apache.org/tomcat/jakarta-tomcat/src/doc/index.html and do a search for "max_threads". You can configure your PoolTCPConnectors for ajp12 and ajp13 via the server.xml file. BE CAREFUL. If you set these values too low, you will undoubtedly hamper performance. However, you shouldn't leave these at the default values once you understand what they do. In my case, I am using ajp13 in all of my code. ajp12, as far as I know, is only being used for startup/shutdown of Tomcat itself. So, I cut the values way back for ajp12 and increased the defaults for ajp13. Thanks, --jeff - Original Message - From: Brendon M. Maragia To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 5:14 PM Subject: to many tomcat processes!! AAH!! Dear Readers, I finally!!! Got Jakarta Tomcat vhosting with Cocoon and it was so so beautiful and sweet, I jumped around the room screaming in joy. Dont try an tell me youve never done that. Anyways, I was using jdk1.1.3 ;] ewww, I know. So I upgraded to j2sdk1.3 and fired everything back up. Low and behold when running ps aux, I was confronted with this. root 2806 44.5 4.1 76632 10580 pts/1 S 20:01 0:01 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root 2844 0.0 4.1 76632 10580 pts/1 S 20:01 0:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root 2845 0.0 4.1 76632 10580 pts/1 S 20:01 0:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root 2846 0.0 4.1 76632 10580 pts/1 S 20:01 0:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l Not just that about 50 more. In total about 54 Jakarta Tomcat processes, all this right after I upgraded to j2sdk1.3. I tried downgrading again to jdk1.2.2, no dice same error. I searched through the mail archives and noticed a guy buy the name of Pete Wright had posted a similar error. I emailed him and he told me the list hadnt been much help. So in posting the same error again I hope to raise user sympathy ;] please help! Sincerely, Brendon Maragia
Re: to many tomcat processes!! AAH!!
This is how Linux shows kernel threads; nothing to be alarmed about. There is only one process. "Brendon M. Maragia" wrote: Dear Readers, I finally!!! Got Jakarta Tomcatvhosting with Cocoon and it was soso beautiful andsweet, I jumped around the room screaming in joy.Don't tryan tell me you've never done that.Anyways, I was usingjdk1.1.3 ;]ewww, I know.So I upgraded to j2sdk1.3 and fired everything back up.Low and behold when runningps -aux, I was confronted with this root2806 44.54.1 76632 10580 pts/1S20:010:01 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root28440.04.1 76632 10580 pts/1S20:010:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root28450.04.1 76632 10580 pts/1S20:010:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l root28460.04.1 76632 10580 pts/1S20:010:00 /usr/local/jdk1.2.2/bin/i386/native_threads/java -Dtomcat.home=/usr/l Not just that about 50 more.In total about 54 Jakarta Tomcat processes, all this right after I upgraded to j2sdk1.3.I tried downgrading again to jdk1.2.2, no dice same error.I searched through the mail archives and noticed a guy buy the name of Pete Wright had posted a similar error.I emailed him and he told me the list hadn't been much help.So in posting the same error again I hope to raise usersympathy ;]please help! Sincerely, Brendon Maragia
