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From "Robinson, Eric" <>
Subject RE: Showing Tomcat Memory Utilization with 'top'
Date Tue, 22 Jun 2010 20:36:08 GMT
> Also, I believe VIRT includes memory shared with other 
> processes, so if you have 50MiB of Java system classes 
> loaded and a modern JVM which shares them among running JVMs, 
> then you'll see that 50MiB included in every process's VIRT 
> that is sharing it, which is somewhat misleading. 

Excellent point. 'top' shows 30-40MB in the 'SHR' column for each java
process. Is that what you're referring to?

Eric Robinson

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