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Old 07-20-2011, 09:15 AM   #1
Registered: Dec 2008
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32bit Tomcat on 64bit RHEL - Maximum heapsize ???

Hi Gurus,

I have running 32bit Tomcat on 64bit Redhat machine. What is the maximum Xms Heapsize for 32bit applikation working in 64bit environment.

-Xms2048M -Xmx3300M
Today I saw that my Tomcat swapping. Seems to bee problem with memory. Does anyone could tell me what kind of heap size should I use ?


Old 07-20-2011, 10:00 AM   #2
Registered: Feb 2011
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The highest theoretical limit of any 32-bit application is 4GB (2^32), but Tomcat could be limiting things below that threshhold. I've seen other JVMs where the limit is 2GB for a 32-bit implementation.

If you're going to 2GB as your initial heap size, I'd say you need to go to 64-bit.
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