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From Jeffrey Janner <>
Subject RE: Tomcat 6 Memory Heap Limit
Date Tue, 15 Feb 2011 16:06:29 GMT

> -----Original Message-----
> From: Caldarale, Charles R []
> Sent: Tuesday, February 15, 2011 10:01 AM
> To: Tomcat Users List
> Subject: RE: Tomcat 6 Memory Heap Limit
> > From: Johnson, Rob E []
> > Subject: RE: Tomcat 6 Memory Heap Limit
> > It is a stand alone 32 bit server
> Then you're stuck.  To get large heap sizes, you'll need a 64-bit OS
> and a 64-bit JVM.
>  - Chuck
You might be able to eek out a few hundred more K using the /3GB OS switch, but not much more.
I don't see why any one Tomcat app would need 40GB of heap, but I assume you know your app
better than I.
But Chuck's correct.  If you are getting OOMs at that heap size, then you'll need to switch
OS & JVM classes.


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