WAS 6.1 OutOfMemoryError

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Hi guys,

I have a problem with WAS 6.1.0.19 -> Dump Event /"systhrow/" OutOfMemoryError

Initial heap - 1536
Maximum heap - 1536

OS: AIX 5.3
Machine: 8Gb mem RAM


any idea ?

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Posted By: Daniel Campos at Feb 19 2009 2:12PM

First, you should be careful about setting the min/max heap size to the same value unless you're using gencon gcpolicy.

Secondly, there is not way we can tell you what's wrong with your system. I can suggest this though:

1. Analyze your verbose GC - if it's not on, turn it on!!! Verbose GC logs are probably the single most important element when looking at memory and performance issues.

2. Pop the heapdump into an analyzer as well. Looking for leaks and large constructs occupying large amount of memory.

Lastly, open a PMR with IBM Support and seek their help.

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Posted By: jpapejr at Feb 19 2009 6:33PM

out of memory

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Hi John,
I just want to know how to Pop the heapdump into an analyzer???what is the exact procedure to generate the heapdump and how to pop it to analyzer??
thanks in advance.

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Posted By: sekhar_minna at Feb 19 2009 7:48PM

Use Google (or your chosen search tool )

Searching on this ->creating a heapdump in websphere

Produces more than enough information for you to get a heapdump.


Secondly, go download the free IBM Support Assistant, install the tool, install the MDD4J tool add on and feed it the heapdump file. Analyze away! Be forwarned: heapdump analysis is not a trivial task in most cases.

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Posted By: jpapejr at Feb 20 2009 4:16PM