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From "Shapira, Yoav" <>
Subject RE: tomcat uses more and more memory
Date Wed, 01 Oct 2003 13:44:11 GMT


>I've been running Tomcat on Linux and have noticed that it always
>consumes more memory and never releases it. I have used the manager
>application to stop applications and watched the memory usage in top,
>but it has only increased.

I assume you already know some top versions on linux display JVM memory
usage as if it's per thread, while it's really the total.  

>I'm fairly certain that it's NOT tomcat, but one of these components
>(or my own stuff). My question is, which is the most likely candidate
>for not allowing the java garbage collector to do its thing? I'm

Any component can be as likely.  This is where you use a profiler.

>How can I monitor garbage collection?

Add -verbose:gc to your JAVA_OPTS or use a profiler, or even a JVM with
monitoring built in like J:Rockit.

Yoav Shapira

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