Maximizing Server Memory Windows 2003 Server 5GB RAM JVM 1.4.2

Maximizing Server Memory Windows 2003 Server 5GB RAM JVM 1.4.2_10

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dkurak@gmail.com - 26 Sep 2006 13:57 GMT

I am running Jboss 4.0.1sp1 with the 1.4.2_10 JVM on a Windows 2003
Server with 5GB RAM. I'd like to run multiple instances of Jboss,
giving each 2GB available RAM to work with leaving the remaining 1GB
for the OS.

Is the above scenario fairly standard? Do I need to do any special
configuration to allow this to happen? Can you point me to a reference
link with some documentation around server memory with multiple
instances?
Thanks in advance...

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Ben_ - 26 Sep 2006 15:19 GMT

AFAIK, practically, you can go up to +/-1.5 GB heap per virtual machine on
Windows.

I found the following a good summary of the story about maximum value
for -Xmx and the /3GB switch:
http://www.unixville.com/~moazam/categories/jvmInternals/

OTOH, JRockit is said to overcome this limitation by supporting split heaps:
http://www.unixville.com/~moazam/categories/jvmInternals/

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