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From tootbatoot <azfar.zees...@gmail.com>
Subject Re: Tomcat 5.0.28 memory usage - garbage collection
Date Fri, 13 Jun 2008 09:00:10 GMT

Hi Thanks. the two applications run on their own and don't share jvm so I can
use different versions - but the webapp I have deployed in tomcat server
requires it to be either on 5.0.28 or 5.5.17 (but using j2sdk1.4.2_12) - we
are using 5.0.28.

thanks for clarifying the behavior of memory - do you see any performance
gains if I switch to 5.5.17 from 5.0.28 . the only problem I have on my end
i that I have to use plugin for 5.5.17 for backward compatibility to
j2sdk1.4.2_12.

thanks



Christopher Schultz-2 wrote:
> 
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> 
> tootbatoot wrote:
> | The reason we have to stick to using this version is that it is
> recommended
> | by another application that tomcat is acting as a client to.
> 
> Do you mean that your (Tomcat-hosted) application is connecting to a
> 3rd-party application? If they are not running in the same JVM, there
> should be no reason that different JVM versions cannot be used. The
> 3rd-party can use whatever they want (1.4?) while you run a newer version.
> 
> | From your posts - I understand that the memory usage might show going
> up all
> | the time - and it will still be ok because it is showing the heap size
> of
> | jvm.
> 
> Yes. The JVM generally does not request memory from the OS and then give
> it back, later. The JVM's memory usage for the Java heap (from the OS's
> perspective) will only increase.
> 
> - -chris
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