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JVM MaxHeapSize

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AShemran

Posted: Tue Jul 11, 2006 1:39 am Post subject: JVM MaxHeapSize

Newbie

Joined: 21 Feb 2006
Posts: 5

Hi,

When using mqsireportproperties to display the ComIbmJVMManager details, it returns a value of -1 for jvmMaxHeapSize. Here is the full command:

mqsireportproperties <Broker> -e <EG> -o ComIbmJVMManager -a

What does -1 mean? and what does it evaluate to??

Platform: Solaris 9
WBIMB 5 CSD07

Thanks
Ahmed

mqmatt

Posted: Tue Jul 11, 2006 5:15 am Post subject:

Grand Master

Joined: 04 Aug 2004
Posts: 1213
Location: Hursley, UK

-1 means to use the default value for this parameter, which is 128Mb.

AShemran

Posted: Tue Jul 11, 2006 6:06 am Post subject:

Newbie

Joined: 21 Feb 2006
Posts: 5

But how could this value be 128MB if the jvmMinHeapSize is 134MB??

jefflowrey

Posted: Tue Jul 11, 2006 2:22 pm Post subject:

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

What that means is that the JVM will do exactly the same thing as every other JVM will do when the -Xms is larger than the -Xmx.

I'd guess that it would assume the larger value for -Xmx.

Regardless, the answer to your question is still "-1 means 'use the default value'".
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