Re: Servlet Memory Leak
On Thu, Aug 28, 2008 at 10:37 PM, Juha Laiho [EMAIL PROTECTED] wrote: Nathan Thatcher wrote: I have a fairly small memory leak in a servlet (Tomcat 6.0) running on a Windows 2003 server. I have been looking into memory profiling to help me find the leak but nothing seems to be or do what I need. Simply put I want a list of all of the objects/primitives (and if possible their values) that are in memory. It would be really nice if I didn't have to bring Tomcat down at all to do this analysis as the servlet is running in a production environment. Does anyone know of a decent free tool that does such a thing? I've used YourKit (http://www.yourkit.com/) in cases exactly like the one you describe. It's not free, but I find it well worth the price (and a free evaluation version is available). I wouldn't be surprised to see free tools emerging with similar functionality, but as I've been content with YourKit, I haven't been looking. -- ..Juha Thanks for the link. Does anyone else know of one that is similar but free for commercial use? - 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: Servlet Memory Leak
I have a fairly small memory leak in a servlet (Tomcat 6.0) running on a Windows 2003 server. I have been looking into memory profiling to help me find the leak but nothing seems to be or do what I need. Simply put I want a list of all of the objects/primitives (and if possible their values) that are in memory. It would be really nice if I didn't have to bring Tomcat down at all to do this analysis as the servlet is running in a production environment. Does anyone know of a decent free tool that does such a thing? If not, what would be a good route to take to find this leak? Thanks a ton. I just finished debugging a major memory leak in my servlet application. Try running the tool jmap that comes with java. It works great with Tomcat - just find the PID of the Tomcat (java) instance and run it on that. For example, fire up Windows Task Manager, go to Applications and find Tomcat. Right-click and choose go to process. This will move you to the Process pane highlighting the Tomcat (java) process ID. Now open a command (console) window and (assuming you have Java paths set correctly), type: jmap -histo PID output.txt (or output.txt - although I used sequentially numbered output files) This will capture the stack info into a file for analysis. The PID is the process ID you noted from the Task Manager. If you run this just after you start Tomcat, then a few times after doing the things that you suspect trigger the memory leak, you should see objects in the map that you can identify as not getting released and thus zero in on the leak. Cheers, -Richard - 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: Servlet Memory Leak
FYI you'll need to run JDK 6 for jmap Martin __ Disclaimer and confidentiality note Everything in this e-mail and any attachments relates to the official business of Sender. This transmission is of a confidential nature and Sender does not endorse distribution to any party other than intended recipient. Sender does not necessarily endorse content contained within this transmission. Date: Fri, 29 Aug 2008 09:44:41 -0700 From: [EMAIL PROTECTED] To: users@tomcat.apache.org Subject: Re: Servlet Memory Leak I have a fairly small memory leak in a servlet (Tomcat 6.0) running on a Windows 2003 server. I have been looking into memory profiling to help me find the leak but nothing seems to be or do what I need. Simply put I want a list of all of the objects/primitives (and if possible their values) that are in memory. It would be really nice if I didn't have to bring Tomcat down at all to do this analysis as the servlet is running in a production environment. Does anyone know of a decent free tool that does such a thing? If not, what would be a good route to take to find this leak? Thanks a ton. I just finished debugging a major memory leak in my servlet application. Try running the tool jmap that comes with java. It works great with Tomcat - just find the PID of the Tomcat (java) instance and run it on that. For example, fire up Windows Task Manager, go to Applications and find Tomcat. Right-click and choose go to process. This will move you to the Process pane highlighting the Tomcat (java) process ID. Now open a command (console) window and (assuming you have Java paths set correctly), type: jmap -histo PID output.txt (or output.txt - although I used sequentially numbered output files) This will capture the stack info into a file for analysis. The PID is the process ID you noted from the Task Manager. If you run this just after you start Tomcat, then a few times after doing the things that you suspect trigger the memory leak, you should see objects in the map that you can identify as not getting released and thus zero in on the leak. Cheers, -Richard - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] _ Be the filmmaker you always wanted to be—learn how to burn a DVD with Windows®. http://clk.atdmt.com/MRT/go/108588797/direct/01/
Re: Servlet Memory Leak
Hello, Interesting thread, indeed. But I've googled around and can't find JMap homepage, I'm afraid. It seems like some other programs has the same name. Even with the profiler keyword, it doesn't give the page I'm looking for. A clue, anyone, please ? Cheers, Pierre On Fri, Aug 29, 2008 at 7:38 PM, Martin Gainty [EMAIL PROTECTED] wrote: FYI you'll need to run JDK 6 for jmap Martin __ Disclaimer and confidentiality note Everything in this e-mail and any attachments relates to the official business of Sender. This transmission is of a confidential nature and Sender does not endorse distribution to any party other than intended recipient. Sender does not necessarily endorse content contained within this transmission. Date: Fri, 29 Aug 2008 09:44:41 -0700 From: [EMAIL PROTECTED] To: users@tomcat.apache.org Subject: Re: Servlet Memory Leak I have a fairly small memory leak in a servlet (Tomcat 6.0) running on a Windows 2003 server. I have been looking into memory profiling to help me find the leak but nothing seems to be or do what I need. Simply put I want a list of all of the objects/primitives (and if possible their values) that are in memory. It would be really nice if I didn't have to bring Tomcat down at all to do this analysis as the servlet is running in a production environment. Does anyone know of a decent free tool that does such a thing? If not, what would be a good route to take to find this leak? Thanks a ton. I just finished debugging a major memory leak in my servlet application. Try running the tool jmap that comes with java. It works great with Tomcat - just find the PID of the Tomcat (java) instance and run it on that. For example, fire up Windows Task Manager, go to Applications and find Tomcat. Right-click and choose go to process. This will move you to the Process pane highlighting the Tomcat (java) process ID. Now open a command (console) window and (assuming you have Java paths set correctly), type: jmap -histo PID output.txt (or output.txt - although I used sequentially numbered output files) This will capture the stack info into a file for analysis. The PID is the process ID you noted from the Task Manager. If you run this just after you start Tomcat, then a few times after doing the things that you suspect trigger the memory leak, you should see objects in the map that you can identify as not getting released and thus zero in on the leak. Cheers, -Richard - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] _ Be the filmmaker you always wanted to be—learn how to burn a DVD with Windows(R). http://clk.atdmt.com/MRT/go/108588797/direct/01/
Re: Servlet Memory Leak
try this http://java.sun.com/j2se/1.5.0/docs/tooldocs/index.html On Fri, Aug 29, 2008 at 6:56 PM, Pierre Goupil [EMAIL PROTECTED]wrote: Hello, Interesting thread, indeed. But I've googled around and can't find JMap homepage, I'm afraid. It seems like some other programs has the same name. Even with the profiler keyword, it doesn't give the page I'm looking for. A clue, anyone, please ? Cheers, Pierre On Fri, Aug 29, 2008 at 7:38 PM, Martin Gainty [EMAIL PROTECTED] wrote: FYI you'll need to run JDK 6 for jmap Martin __ Disclaimer and confidentiality note Everything in this e-mail and any attachments relates to the official business of Sender. This transmission is of a confidential nature and Sender does not endorse distribution to any party other than intended recipient. Sender does not necessarily endorse content contained within this transmission. Date: Fri, 29 Aug 2008 09:44:41 -0700 From: [EMAIL PROTECTED] To: users@tomcat.apache.org Subject: Re: Servlet Memory Leak I have a fairly small memory leak in a servlet (Tomcat 6.0) running on a Windows 2003 server. I have been looking into memory profiling to help me find the leak but nothing seems to be or do what I need. Simply put I want a list of all of the objects/primitives (and if possible their values) that are in memory. It would be really nice if I didn't have to bring Tomcat down at all to do this analysis as the servlet is running in a production environment. Does anyone know of a decent free tool that does such a thing? If not, what would be a good route to take to find this leak? Thanks a ton. I just finished debugging a major memory leak in my servlet application. Try running the tool jmap that comes with java. It works great with Tomcat - just find the PID of the Tomcat (java) instance and run it on that. For example, fire up Windows Task Manager, go to Applications and find Tomcat. Right-click and choose go to process. This will move you to the Process pane highlighting the Tomcat (java) process ID. Now open a command (console) window and (assuming you have Java paths set correctly), type: jmap -histo PID output.txt (or output.txt - although I used sequentially numbered output files) This will capture the stack info into a file for analysis. The PID is the process ID you noted from the Task Manager. If you run this just after you start Tomcat, then a few times after doing the things that you suspect trigger the memory leak, you should see objects in the map that you can identify as not getting released and thus zero in on the leak. Cheers, -Richard - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] _ Be the filmmaker you always wanted to be—learn how to burn a DVD with Windows(R). http://clk.atdmt.com/MRT/go/108588797/direct/01/
Re: Servlet Memory Leak
Am Freitag, den 29.08.2008, 19:56 +0200 schrieb Pierre Goupil: Hello, Interesting thread, indeed. But I've googled around and can't find JMap homepage, I'm afraid. It seems like some other programs has the same name. Even with the profiler keyword, it doesn't give the page I'm looking for. I found these two links interesting http://blogs.sun.com/sundararajan/entry/querying_java_heap_with_oql http://blogs.sun.com/sundararajan/entry/permanent_generation_analysis_with_oql Bye Felix A clue, anyone, please ? Cheers, Pierre On Fri, Aug 29, 2008 at 7:38 PM, Martin Gainty [EMAIL PROTECTED] wrote: FYI you'll need to run JDK 6 for jmap Martin __ Disclaimer and confidentiality note Everything in this e-mail and any attachments relates to the official business of Sender. This transmission is of a confidential nature and Sender does not endorse distribution to any party other than intended recipient. Sender does not necessarily endorse content contained within this transmission. Date: Fri, 29 Aug 2008 09:44:41 -0700 From: [EMAIL PROTECTED] To: users@tomcat.apache.org Subject: Re: Servlet Memory Leak I have a fairly small memory leak in a servlet (Tomcat 6.0) running on a Windows 2003 server. I have been looking into memory profiling to help me find the leak but nothing seems to be or do what I need. Simply put I want a list of all of the objects/primitives (and if possible their values) that are in memory. It would be really nice if I didn't have to bring Tomcat down at all to do this analysis as the servlet is running in a production environment. Does anyone know of a decent free tool that does such a thing? If not, what would be a good route to take to find this leak? Thanks a ton. I just finished debugging a major memory leak in my servlet application. Try running the tool jmap that comes with java. It works great with Tomcat - just find the PID of the Tomcat (java) instance and run it on that. For example, fire up Windows Task Manager, go to Applications and find Tomcat. Right-click and choose go to process. This will move you to the Process pane highlighting the Tomcat (java) process ID. Now open a command (console) window and (assuming you have Java paths set correctly), type: jmap -histo PID output.txt (or output.txt - although I used sequentially numbered output files) This will capture the stack info into a file for analysis. The PID is the process ID you noted from the Task Manager. If you run this just after you start Tomcat, then a few times after doing the things that you suspect trigger the memory leak, you should see objects in the map that you can identify as not getting released and thus zero in on the leak. Cheers, -Richard - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] _ Be the filmmaker you always wanted to be—learn how to burn a DVD with Windows(R). http://clk.atdmt.com/MRT/go/108588797/direct/01/ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Servlet Memory Leak
I have a fairly small memory leak in a servlet (Tomcat 6.0) running on a Windows 2003 server. I have been looking into memory profiling to help me find the leak but nothing seems to be or do what I need. Simply put I want a list of all of the objects/primitives (and if possible their values) that are in memory. It would be really nice if I didn't have to bring Tomcat down at all to do this analysis as the servlet is running in a production environment. Does anyone know of a decent free tool that does such a thing? If not, what would be a good route to take to find this leak? Thanks a ton.
Re: Servlet Memory Leak
Nathan Thatcher wrote: I have a fairly small memory leak in a servlet (Tomcat 6.0) running on a Windows 2003 server. I have been looking into memory profiling to help me find the leak but nothing seems to be or do what I need. Simply put I want a list of all of the objects/primitives (and if possible their values) that are in memory. It would be really nice if I didn't have to bring Tomcat down at all to do this analysis as the servlet is running in a production environment. Does anyone know of a decent free tool that does such a thing? I've used YourKit (http://www.yourkit.com/) in cases exactly like the one you describe. It's not free, but I find it well worth the price (and a free evaluation version is available). I wouldn't be surprised to see free tools emerging with similar functionality, but as I've been content with YourKit, I haven't been looking. -- ..Juha - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
