and get jvmstat from sun, it will allow you to see which area in the heap runs out of space.
Ta Matt -----Original Message----- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: 21 December 2004 15:12 To: Tomcat Users List Subject: RE: Why is tomcat (java) so memory intensive? you will need to dig deeper into jprobe or whatever profiler you are using. after that you will see where the memory goes. also, try the latest version of tomcat 5.0 Filip -----Original Message----- From: Philippe Deslauriers [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 21, 2004 8:53 AM To: [EMAIL PROTECTED] Subject: Why is tomcat (java) so memory intensive? I am using Tomcat 5.0.19 on Windows XP SP2, J2SDK 1.4.2_03. I have a serious memory problem with Tomcat, it just EAT memory without explanation, until OOM error occurs. The Java.exe process in the windows task manager reports using between 95Mb and 105Mb after the startup of the webapp. I do not use Xms Xmx options in dev mode. It just grows until it runs out of memory. There is not much memory available (around 150Mb), yet it should be enough for a few classes, JSP and almost not data in the database. Like a big boy, I decided to use Jprofiler demo to figure out where the memory leak was, to see that there is only 20 Mb allocated by the VM!!! So where does the rest of the memory goes? I do not use any non-java library (dll), I don't think I'm doing anything special. The app use a the Versant JDO implementation (instead of direct JDBC) using MS SQL server. But hey, the app is still in dev mode, with only the developpers using it, the DB is (almost) empty, so the amount data is not in cause. Anyways using 20Mb of heap is very reasonable (there will be at least 1gb available in production), but why is the java.exe process eating memory like a pig an the profiler is not showing where the mem goes? (by the way, I did deleted ALL the filters from Jprofiler). If the app would take 2Gb in memory I would not care, as long as I know what is using the memory. I did profile an app running on 5.0.18, and the same magic happens, the memory used by the java.exe is far from close to what the total heap size of the VM reports to be. Am I going crazy? Any ideas? Thanks Filip:) --------------------------------------------------------------------- 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]
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