Re: Urgent-Java webservers on iSeries and other platforms
Thanks for all your help. Pete. Peter Lin wrote: My friend works at a shop that is heavily IBM centric. They use solaris, and iSeries. they had a similar issue with memory going crazy and not getting cleared correctly. Once they patched the VM, the memory issues went away. it's possible you may have found a new GC issue, which has no fix yet. The problem he discovered was patched last year. I don't know the details, but the behavior you described sounded very similar to his experience. this behavior sounds similar to other GC issues. sorry I can't provide more details about my friend's environment, since that information is beyond my reach. I believe he is using jdk1.3.1, since they are very slow with upgrades and typically wait a long time. peter lin Pete Stokes [EMAIL PROTECTED] wrote: Peter, Apparently we are fully PTF'd up, os, websphere, the works. Did your friend get it working or did they move platforms? If your friend whom had similar experiences could share them, it would be great to hear what they did. Anything would help because it's got to the point of IBM throwing RAM at us. I'm sure at this stage of the game we could try and get a finders fee from IBM! ;) (they're throwing RAM modules at 8k a pop for nothing so it's worth a go!!) Regards, Pete. Peter Lin wrote: I asked around and a close friend encountered a similar problem a year back. Try patching the VM and the problem should go away. peter lin Peter Stokes wrote: Hi, I'm on a site where a third party application has been put on WebSphere 4.0.5 on an iSeries 820/V5R2. We have had horrendous performance / stability problems even with 10 users and even IBM cannot seem to help. Production is currently sitting pretty on a rushed install of SuSE 9 on a Dell desktop with 1gig RAM and Tomcat. What I am after is opinions / a comparason someone has done (weblink?) / docco about Java webservers performance looking at iSeries, Intel, Sparcs etc. They are into the iSeries/WebSphere 4.0.5 mindset, but no one can answer why this was the recommended setup and they seem to be fixed on this route, but no-one can make it work! There is nothing else on WebSphere other than this app, so if I can get some info, I then actually have some stats / papers to help recommendations, if IBM cannot fix this in the next couple of days (they've had level 1 guys on it for 6 weeks). Anything would be a great help. 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! Hotjobs: Enter the Signing Bonus Sweepstakes *** 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! Hotjobs: Enter the Signing Bonus Sweepstakes *** 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: Urgent-Java webservers on iSeries and other platforms
good luck with your debugging. I hope you're able to fix it. if you figure out the problem, I hope you post the solution. In case others are struggling with iSeries :) peter lin Pete Stokes [EMAIL PROTECTED] wrote: Thanks for all your help. Pete. Peter Lin wrote: My friend works at a shop that is heavily IBM centric. They use solaris, and iSeries. they had a similar issue with memory going crazy and not getting cleared correctly. Once they patched the VM, the memory issues went away. it's possible you may have found a new GC issue, which has no fix yet. The problem he discovered was patched last year. I don't know the details, but the behavior you described sounded very similar to his experience. this behavior sounds similar to other GC issues. sorry I can't provide more details about my friend's environment, since that information is beyond my reach. I believe he is using jdk1.3.1, since they are very slow with upgrades and typically wait a long time. peter lin Pete Stokes wrote: Peter, Apparently we are fully PTF'd up, os, websphere, the works. Did your friend get it working or did they move platforms? If your friend whom had similar experiences could share them, it would be great to hear what they did. Anything would help because it's got to the point of IBM throwing RAM at us. I'm sure at this stage of the game we could try and get a finders fee from IBM! ;) (they're throwing RAM modules at 8k a pop for nothing so it's worth a go!!) Regards, Pete. Peter Lin wrote: I asked around and a close friend encountered a similar problem a year back. Try patching the VM and the problem should go away. peter lin Peter Stokes wrote: Hi, I'm on a site where a third party application has been put on WebSphere 4.0.5 on an iSeries 820/V5R2. We have had horrendous performance / stability problems even with 10 users and even IBM cannot seem to help. Production is currently sitting pretty on a rushed install of SuSE 9 on a Dell desktop with 1gig RAM and Tomcat. What I am after is opinions / a comparason someone has done (weblink?) / docco about Java webservers performance looking at iSeries, Intel, Sparcs etc. They are into the iSeries/WebSphere 4.0.5 mindset, but no one can answer why this was the recommended setup and they seem to be fixed on this route, but no-one can make it work! There is nothing else on WebSphere other than this app, so if I can get some info, I then actually have some stats / papers to help recommendations, if IBM cannot fix this in the next couple of days (they've had level 1 guys on it for 6 weeks). Anything would be a great help. 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! Hotjobs: Enter the Signing Bonus Sweepstakes *** 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! Hotjobs: Enter the Signing Bonus Sweepstakes *** 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
Re: Urgent-Java webservers on iSeries and other platforms
That sounds a bit odd to me. A well designed webapp or ejb shouldn't have horrible performance for 10 concurrent users. If you're using stateful EJB's you may want to profile it first. Without knowledge of what the app does, my first guess is something in the app is eating up all the CPU and memory. If the app has been profiled aggressively and you know it's not the app itself, i would say install the app on JBoss and compare the performance. If you have hard numbers with the same app, it is much easier to get people to listen. you can also d/l weblogic and see how it performs. keep in mind weblogic has a limit of 10 concurrent connections, so if you need to load test with more than 10 connections, you'll have to smooze the BEA sales guys. You should be able to get them to give you a temporary one month license with unlimited connections, since they are trying to win customers from IBM. there are several old benchmarks comparing various servlet containers, which may or may not help. If you use ejb, those results won't do much for you. if you provide more details, you'll get better help :) peter lin Peter Stokes [EMAIL PROTECTED] wrote: Hi, I'm on a site where a third party application has been put on WebSphere 4.0.5 on an iSeries 820/V5R2. We have had horrendous performance / stability problems even with 10 users and even IBM cannot seem to help. Production is currently sitting pretty on a rushed install of SuSE 9 on a Dell desktop with 1gig RAM and Tomcat. What I am after is opinions / a comparason someone has done (weblink?) / docco about Java webservers performance looking at iSeries, Intel, Sparcs etc. They are into the iSeries/WebSphere 4.0.5 mindset, but no one can answer why this was the recommended setup and they seem to be fixed on this route, but no-one can make it work! There is nothing else on WebSphere other than this app, so if I can get some info, I then actually have some stats / papers to help recommendations, if IBM cannot fix this in the next couple of days (they've had level 1 guys on it for 6 weeks). Anything would be a great help. 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! Hotjobs: Enter the Signing Bonus Sweepstakes
Re: Urgent-Java webservers on iSeries and other platforms
The app is really a basic war file - it uses JTOpen to connect to iSeries. Nothing fancy, a few patterns used, no EJBs etc. Production was rushed onto Tomcat 5.0.16 on a standard Dell desktop with 1gig RAM running SuSE 9, load tested to 150 users. It flies! Page to page times (DB everytime) are incrediblely fast, basically instant even under 150 user load test. On the iSeries, we get over (live objects) 2million Vector object, 2million PCMLDocuments, and a whole host of other big figures. I used JProfiler on the app (Tomcat) and we get nothing like that. IBM seem now to say that we need to *dedicate* 2 processors, 4-6gig of RAM to continue to test the app on an iSeries (820). We are also totally patched up on the iSeries. Interesting figure is that when the iSeries/WebSphere hangs, we shut off the load test and it recovers after 20-30mins with a collected object gc figure of 25million+ compared to a normal 5million. The gc cycles also intermingle. GC cycle 19 starts, and GC 20 then starts before 19 has finished. I have collected loads of info - if you need anything else give me a shout. Regards, Pete. Peter Lin wrote: That sounds a bit odd to me. A well designed webapp or ejb shouldn't have horrible performance for 10 concurrent users. If you're using stateful EJB's you may want to profile it first. Without knowledge of what the app does, my first guess is something in the app is eating up all the CPU and memory. If the app has been profiled aggressively and you know it's not the app itself, i would say install the app on JBoss and compare the performance. If you have hard numbers with the same app, it is much easier to get people to listen. you can also d/l weblogic and see how it performs. keep in mind weblogic has a limit of 10 concurrent connections, so if you need to load test with more than 10 connections, you'll have to smooze the BEA sales guys. You should be able to get them to give you a temporary one month license with unlimited connections, since they are trying to win customers from IBM. there are several old benchmarks comparing various servlet containers, which may or may not help. If you use ejb, those results won't do much for you. if you provide more details, you'll get better help :) peter lin Peter Stokes [EMAIL PROTECTED] wrote: Hi, I'm on a site where a third party application has been put on WebSphere 4.0.5 on an iSeries 820/V5R2. We have had horrendous performance / stability problems even with 10 users and even IBM cannot seem to help. Production is currently sitting pretty on a rushed install of SuSE 9 on a Dell desktop with 1gig RAM and Tomcat. What I am after is opinions / a comparason someone has done (weblink?) / docco about Java webservers performance looking at iSeries, Intel, Sparcs etc. They are into the iSeries/WebSphere 4.0.5 mindset, but no one can answer why this was the recommended setup and they seem to be fixed on this route, but no-one can make it work! There is nothing else on WebSphere other than this app, so if I can get some info, I then actually have some stats / papers to help recommendations, if IBM cannot fix this in the next couple of days (they've had level 1 guys on it for 6 weeks). Anything would be a great help. 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! Hotjobs: Enter the Signing Bonus Sweepstakes *** 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: Urgent-Java webservers on iSeries and other platforms
Ok, that makes sense. It sounds like there's a major problem with the iSeries jdk and VM garbage collection. Unless IBM fixes the garbage collection, using another webserver on that box most likely won't help. given that you've profiled it on Suse + tomcat and it performed well, the cause of the bad performance is simply a matter of the VM's GC algorithm on the iSeries. I haven't use the iSeries, but I believe it uses IBM's RISC processor. unless there's another VM/jdk available for iSeries, I don't think there's much to do. only other option is use an older jdk like 1.3.1 and see if the iSeries continues to exhibit the same behavior. peter lin Pete Stokes [EMAIL PROTECTED] wrote: The app is really a basic war file - it uses JTOpen to connect to iSeries. Nothing fancy, a few patterns used, no EJBs etc. Production was rushed onto Tomcat 5.0.16 on a standard Dell desktop with 1gig RAM running SuSE 9, load tested to 150 users. It flies! Page to page times (DB everytime) are incrediblely fast, basically instant even under 150 user load test. On the iSeries, we get over (live objects) 2million Vector object, 2million PCMLDocuments, and a whole host of other big figures. I used JProfiler on the app (Tomcat) and we get nothing like that. IBM seem now to say that we need to *dedicate* 2 processors, 4-6gig of RAM to continue to test the app on an iSeries (820). We are also totally patched up on the iSeries. Interesting figure is that when the iSeries/WebSphere hangs, we shut off the load test and it recovers after 20-30mins with a collected object gc figure of 25million+ compared to a normal 5million. The gc cycles also intermingle. GC cycle 19 starts, and GC 20 then starts before 19 has finished. I have collected loads of info - if you need anything else give me a shout. Regards, Pete. Peter Lin wrote: That sounds a bit odd to me. A well designed webapp or ejb shouldn't have horrible performance for 10 concurrent users. If you're using stateful EJB's you may want to profile it first. Without knowledge of what the app does, my first guess is something in the app is eating up all the CPU and memory. If the app has been profiled aggressively and you know it's not the app itself, i would say install the app on JBoss and compare the performance. If you have hard numbers with the same app, it is much easier to get people to listen. you can also d/l weblogic and see how it performs. keep in mind weblogic has a limit of 10 concurrent connections, so if you need to load test with more than 10 connections, you'll have to smooze the BEA sales guys. You should be able to get them to give you a temporary one month license with unlimited connections, since they are trying to win customers from IBM. there are several old benchmarks comparing various servlet containers, which may or may not help. If you use ejb, those results won't do much for you. if you provide more details, you'll get better help :) peter lin Peter Stokes wrote: Hi, I'm on a site where a third party application has been put on WebSphere 4.0.5 on an iSeries 820/V5R2. We have had horrendous performance / stability problems even with 10 users and even IBM cannot seem to help. Production is currently sitting pretty on a rushed install of SuSE 9 on a Dell desktop with 1gig RAM and Tomcat. What I am after is opinions / a comparason someone has done (weblink?) / docco about Java webservers performance looking at iSeries, Intel, Sparcs etc. They are into the iSeries/WebSphere 4.0.5 mindset, but no one can answer why this was the recommended setup and they seem to be fixed on this route, but no-one can make it work! There is nothing else on WebSphere other than this app, so if I can get some info, I then actually have some stats / papers to help recommendations, if IBM cannot fix this in the next couple of days (they've had level 1 guys on it for 6 weeks). Anything would be a great help. 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! Hotjobs: Enter the Signing Bonus Sweepstakes *** This email and any files
Re: Urgent-Java webservers on iSeries and other platforms
I asked around and a close friend encountered a similar problem a year back. Try patching the VM and the problem should go away. peter lin Peter Stokes [EMAIL PROTECTED] wrote: Hi, I'm on a site where a third party application has been put on WebSphere 4.0.5 on an iSeries 820/V5R2. We have had horrendous performance / stability problems even with 10 users and even IBM cannot seem to help. Production is currently sitting pretty on a rushed install of SuSE 9 on a Dell desktop with 1gig RAM and Tomcat. What I am after is opinions / a comparason someone has done (weblink?) / docco about Java webservers performance looking at iSeries, Intel, Sparcs etc. They are into the iSeries/WebSphere 4.0.5 mindset, but no one can answer why this was the recommended setup and they seem to be fixed on this route, but no-one can make it work! There is nothing else on WebSphere other than this app, so if I can get some info, I then actually have some stats / papers to help recommendations, if IBM cannot fix this in the next couple of days (they've had level 1 guys on it for 6 weeks). Anything would be a great help. 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! Hotjobs: Enter the Signing Bonus Sweepstakes
Re: Urgent-Java webservers on iSeries and other platforms
Peter, Apparently we are fully PTF'd up, os, websphere, the works. Did your friend get it working or did they move platforms? If your friend whom had similar experiences could share them, it would be great to hear what they did. Anything would help because it's got to the point of IBM throwing RAM at us. I'm sure at this stage of the game we could try and get a finders fee from IBM! ;) (they're throwing RAM modules at 8k a pop for nothing so it's worth a go!!) Regards, Pete. Peter Lin wrote: I asked around and a close friend encountered a similar problem a year back. Try patching the VM and the problem should go away. peter lin Peter Stokes [EMAIL PROTECTED] wrote: Hi, I'm on a site where a third party application has been put on WebSphere 4.0.5 on an iSeries 820/V5R2. We have had horrendous performance / stability problems even with 10 users and even IBM cannot seem to help. Production is currently sitting pretty on a rushed install of SuSE 9 on a Dell desktop with 1gig RAM and Tomcat. What I am after is opinions / a comparason someone has done (weblink?) / docco about Java webservers performance looking at iSeries, Intel, Sparcs etc. They are into the iSeries/WebSphere 4.0.5 mindset, but no one can answer why this was the recommended setup and they seem to be fixed on this route, but no-one can make it work! There is nothing else on WebSphere other than this app, so if I can get some info, I then actually have some stats / papers to help recommendations, if IBM cannot fix this in the next couple of days (they've had level 1 guys on it for 6 weeks). Anything would be a great help. 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! Hotjobs: Enter the Signing Bonus Sweepstakes *** 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: Urgent-Java webservers on iSeries and other platforms
My friend works at a shop that is heavily IBM centric. They use solaris, and iSeries. they had a similar issue with memory going crazy and not getting cleared correctly. Once they patched the VM, the memory issues went away. it's possible you may have found a new GC issue, which has no fix yet. The problem he discovered was patched last year. I don't know the details, but the behavior you described sounded very similar to his experience. this behavior sounds similar to other GC issues. sorry I can't provide more details about my friend's environment, since that information is beyond my reach. I believe he is using jdk1.3.1, since they are very slow with upgrades and typically wait a long time. peter lin Pete Stokes [EMAIL PROTECTED] wrote: Peter, Apparently we are fully PTF'd up, os, websphere, the works. Did your friend get it working or did they move platforms? If your friend whom had similar experiences could share them, it would be great to hear what they did. Anything would help because it's got to the point of IBM throwing RAM at us. I'm sure at this stage of the game we could try and get a finders fee from IBM! ;) (they're throwing RAM modules at 8k a pop for nothing so it's worth a go!!) Regards, Pete. Peter Lin wrote: I asked around and a close friend encountered a similar problem a year back. Try patching the VM and the problem should go away. peter lin Peter Stokes wrote: Hi, I'm on a site where a third party application has been put on WebSphere 4.0.5 on an iSeries 820/V5R2. We have had horrendous performance / stability problems even with 10 users and even IBM cannot seem to help. Production is currently sitting pretty on a rushed install of SuSE 9 on a Dell desktop with 1gig RAM and Tomcat. What I am after is opinions / a comparason someone has done (weblink?) / docco about Java webservers performance looking at iSeries, Intel, Sparcs etc. They are into the iSeries/WebSphere 4.0.5 mindset, but no one can answer why this was the recommended setup and they seem to be fixed on this route, but no-one can make it work! There is nothing else on WebSphere other than this app, so if I can get some info, I then actually have some stats / papers to help recommendations, if IBM cannot fix this in the next couple of days (they've had level 1 guys on it for 6 weeks). Anything would be a great help. 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! Hotjobs: Enter the Signing Bonus Sweepstakes *** 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! Hotjobs: Enter the Signing Bonus Sweepstakes
