Heap Size in 32 bit Redhat

[ercan canlier]

Hi there,

The os of our java based application is RHEL 5. It has 4GB physical ram.

Before we install kernel modules to enable PAE, output of memory commands
were

showing us 3GB, successfully patched PAE module and now current  memory is
4GB.

The version of java is :

java version "1.6.0"
OpenJDK  Runtime Environment (build 1.6.0-b09)
OpenJDK Server VM (build 1.6.0-b09, mixed mode)

After i installl debuginfo packages to my local os Fedora 12, i could
successfully run jmap command

to profile application. But in RHEL5 i couldnt find the proper packages to
see what is going on my application.

I would like to learn current heap size and all other informations about
current optimization that i used like above:

-Xmx3800m -Xms3800m -Xmn2g -Xss128k -XX:+UseParallelGC
-XX:ParallelGCThreads=20 -XX:+UseConcMarkSweepGC

I use this parameters and the application is running... Can you tell me the
max heap size in 32 Bit OS which includes PAE module?

In all cases as i know, people tells that if you have 32 bit system, you
just see 3GB physical memory, but if you are using linux and if you install

PAE kernel modules you can see more than 3GB, so in the same cases it must
have heap size as well, i dont know these with details, is there anybody who
can guide me in advanced?

thanks


-- 
ERCAN CANLIER
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