OOM-Killer, jboss and kernel panic

Posted by user32425 on Server Fault See other posts from Server Fault or by user32425
Published on 2010-01-21T04:22:35Z Indexed on 2010/04/14 10:03 UTC
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Filed under:

oom

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redhat

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32-bit

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vmware-esx

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jboss

Hi,

We are running RedHat 3.4.6(x32) on VMWareEsx3.5(x64) with 6GB RAM. A few java processes(including jboss) are running in the background.

The problem is that the java processes consume lots of memory, and sometimes they are killed by the OOM-killer. When OOM-killer is about to act, the free physical memory is very low 100MB-200MB, but the swap is not used (99% free). Sometimes this causes a kernel panic too.

So why isn't the swap used?
How to investigate this kernel panic?
Is using 6GB memory on 32bit Redhat wise?

Thanks

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