Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments)
I changed options to : export CATALINA_OPTS=-server -XX:+HeapDumpOnOutOfMemoryError -verbose:gc -XX:HeapDumpPath=/data02/www2/vhosts/merchants.koodos.com/dumps/ -Xms1024m -Xmx1024m Waiting to see the results today. Since a couple of days only this issue started (OutOfMem..) I can see the garbage collection happening, but it seems growing in 5 or 10 mb folds. Still Tomcat is keeping up. After about 8 hours of work only must see the results as thats the usual time it crashes. Thanks Maduranga On Fri, Jul 4, 2008 at 5:56 AM, Surendrakumar Viswanathan -X (suviswan - HCL at Cisco) [EMAIL PROTECTED] wrote: Hi Add -XX:+HeapDumpOnOutOfMemoryError option to you JVM parameter. It will dump the heap (in hprof format) on OOM. You can take the hprof file and then analyze using Eclipse MAT (Memory Analyzer tool). This will give you information on which objects are getting used most. Based on that you can find out the corresponding application code and check whether there are memory leak exists in the code. The random slowness is usually associated with GC. Enable verboseGC with timestamp option and then check whether the GC is happening at the corresponding time of slowness. Suren -Original Message- From: Maduranga [mailto:[EMAIL PROTECTED] Sent: Friday, July 04, 2008 3:22 AM To: Tomcat Users List Subject: Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) Its 32 bit. Sorry I missed that earlier. Could be a problem with web app. Could you give me an idea/example for a profiler? Any open source ones available? I am really in a tight schedule to get this sorted out. All the help much appreciated Thanks a lot Maduranga On Thu, Jul 3, 2008 at 6:13 PM, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: Maduranga [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) OS: Red Hat Enterprise Linux AS release 4 (Nahant Update 2) Is that 64-bit or 32-bit? I have 2G ram for JVM, but I would like to stick with 1G if its possible. If that's 2G for the entire JVM process, the maximum heap you can get away with would be somewhere around 1.5G, since there's a fair amount of space needed for code, libraries, file space, etc. Do you recommend upgrading to Tomcat 6? Might have some benefit, but you really need to run a profiler to find out what's consuming the memory. The problem is likely to like with your webapp, not Tomcat itself. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Maduranga - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Maduranga - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments)
Thanks a lot for the Tip. Eclipse MAT helped a lot! All the best to all of you!! On Fri, Jul 4, 2008 at 5:56 AM, Surendrakumar Viswanathan -X (suviswan - HCL at Cisco) [EMAIL PROTECTED] wrote: Hi Add -XX:+HeapDumpOnOutOfMemoryError option to you JVM parameter. It will dump the heap (in hprof format) on OOM. You can take the hprof file and then analyze using Eclipse MAT (Memory Analyzer tool). This will give you information on which objects are getting used most. Based on that you can find out the corresponding application code and check whether there are memory leak exists in the code. The random slowness is usually associated with GC. Enable verboseGC with timestamp option and then check whether the GC is happening at the corresponding time of slowness. Suren -Original Message- From: Maduranga [mailto:[EMAIL PROTECTED] Sent: Friday, July 04, 2008 3:22 AM To: Tomcat Users List Subject: Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) Its 32 bit. Sorry I missed that earlier. Could be a problem with web app. Could you give me an idea/example for a profiler? Any open source ones available? I am really in a tight schedule to get this sorted out. All the help much appreciated Thanks a lot Maduranga On Thu, Jul 3, 2008 at 6:13 PM, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: Maduranga [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) OS: Red Hat Enterprise Linux AS release 4 (Nahant Update 2) Is that 64-bit or 32-bit? I have 2G ram for JVM, but I would like to stick with 1G if its possible. If that's 2G for the entire JVM process, the maximum heap you can get away with would be somewhere around 1.5G, since there's a fair amount of space needed for code, libraries, file space, etc. Do you recommend upgrading to Tomcat 6? Might have some benefit, but you really need to run a profiler to find out what's consuming the memory. The problem is likely to like with your webapp, not Tomcat itself. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Maduranga - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Maduranga - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat Runs OutOfMemory (Not at repeated WAR deployments)
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Subject: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) I changed many JVM parameters with no luck and currently it is: -server -Xms512m -Xmx2048m -XX:NewSize=128m -XX:MaxNewSize=128m -XX:SurvivorRatio=4 I would strongly recommend against playing with NewSize, MaxNewSize, or SurvivorRatio; getting them even slightly out of kilter can foul things up pretty quickly. What platform are you running on? If it's not 64-bit, the -Xmx2048m won't work. How much RAM do you have that you can give to the JVM? Your -Xmx setting must be noticeably smaller than that, or you'll get into page thrashing. Setting -Xms and -Xmx to the same value is usually benficial. Moving up to a 1.6 JVM may help. You should run a heap profiler and find out exactly what is consuming the heap and where it's being allcoated. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments)
OS: Red Hat Enterprise Linux AS release 4 (Nahant Update 2) I have 2G ram for JVM, but I would like to stick with 1G if its possible. With the change of JVM settings still no positive result.. therefore I will switch back to Xms and Xms as you say. (with a same value -- 1G may be?). Do you recommend upgrading to Tomcat 6? Thanks Chuck for your responses, much appreciated! /Maduranga On Thu, Jul 3, 2008 at 4:49 PM, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Subject: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) I changed many JVM parameters with no luck and currently it is: -server -Xms512m -Xmx2048m -XX:NewSize=128m -XX:MaxNewSize=128m -XX:SurvivorRatio=4 I would strongly recommend against playing with NewSize, MaxNewSize, or SurvivorRatio; getting them even slightly out of kilter can foul things up pretty quickly. What platform are you running on? If it's not 64-bit, the -Xmx2048m won't work. How much RAM do you have that you can give to the JVM? Your -Xmx setting must be noticeably smaller than that, or you'll get into page thrashing. Setting -Xms and -Xmx to the same value is usually benficial. Moving up to a 1.6 JVM may help. You should run a heap profiler and find out exactly what is consuming the heap and where it's being allcoated. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Maduranga - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat Runs OutOfMemory (Not at repeated WAR deployments)
From: Maduranga [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) OS: Red Hat Enterprise Linux AS release 4 (Nahant Update 2) Is that 64-bit or 32-bit? I have 2G ram for JVM, but I would like to stick with 1G if its possible. If that's 2G for the entire JVM process, the maximum heap you can get away with would be somewhere around 1.5G, since there's a fair amount of space needed for code, libraries, file space, etc. Do you recommend upgrading to Tomcat 6? Might have some benefit, but you really need to run a profiler to find out what's consuming the memory. The problem is likely to like with your webapp, not Tomcat itself. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments)
Its 32 bit. Sorry I missed that earlier. Could be a problem with web app. Could you give me an idea/example for a profiler? Any open source ones available? I am really in a tight schedule to get this sorted out. All the help much appreciated Thanks a lot Maduranga On Thu, Jul 3, 2008 at 6:13 PM, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: Maduranga [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) OS: Red Hat Enterprise Linux AS release 4 (Nahant Update 2) Is that 64-bit or 32-bit? I have 2G ram for JVM, but I would like to stick with 1G if its possible. If that's 2G for the entire JVM process, the maximum heap you can get away with would be somewhere around 1.5G, since there's a fair amount of space needed for code, libraries, file space, etc. Do you recommend upgrading to Tomcat 6? Might have some benefit, but you really need to run a profiler to find out what's consuming the memory. The problem is likely to like with your webapp, not Tomcat itself. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Maduranga - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat Runs OutOfMemory (Not at repeated WAR deployments)
Hi Add -XX:+HeapDumpOnOutOfMemoryError option to you JVM parameter. It will dump the heap (in hprof format) on OOM. You can take the hprof file and then analyze using Eclipse MAT (Memory Analyzer tool). This will give you information on which objects are getting used most. Based on that you can find out the corresponding application code and check whether there are memory leak exists in the code. The random slowness is usually associated with GC. Enable verboseGC with timestamp option and then check whether the GC is happening at the corresponding time of slowness. Suren -Original Message- From: Maduranga [mailto:[EMAIL PROTECTED] Sent: Friday, July 04, 2008 3:22 AM To: Tomcat Users List Subject: Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) Its 32 bit. Sorry I missed that earlier. Could be a problem with web app. Could you give me an idea/example for a profiler? Any open source ones available? I am really in a tight schedule to get this sorted out. All the help much appreciated Thanks a lot Maduranga On Thu, Jul 3, 2008 at 6:13 PM, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: Maduranga [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat Runs OutOfMemory (Not at repeated WAR deployments) OS: Red Hat Enterprise Linux AS release 4 (Nahant Update 2) Is that 64-bit or 32-bit? I have 2G ram for JVM, but I would like to stick with 1G if its possible. If that's 2G for the entire JVM process, the maximum heap you can get away with would be somewhere around 1.5G, since there's a fair amount of space needed for code, libraries, file space, etc. Do you recommend upgrading to Tomcat 6? Might have some benefit, but you really need to run a profiler to find out what's consuming the memory. The problem is likely to like with your webapp, not Tomcat itself. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Maduranga - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
