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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » JVM size determination for broker WMB 8.0.0.2

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ghoshly
PostPosted: Tue Aug 06, 2013 8:55 am    Post subject: JVM size determination for broker WMB 8.0.0.2 Reply with quote

Partisan

Joined: 10 Jan 2008
Posts: 333

Hello,

Is there a way to identify or near possible requirement of JVM size we should set for our broker environment, given x number of execution group and y number of message flows deployed amongst those execution groups with XSLT usage, cache enabled etc. Just the way we can identify total database connection required etc.\

I understand, that optimal number can be identified with proper performance testing, but want to start with some good digits.

I can see

Quote:
-n jvmMinHeapSize
The minimum size of the storage available to the JVM, specified in bytes.
•Value type: integer
•Initial value: -1, which represents 33554432 bytes (32MB) with the global cache disabled, or 100663296 (96MB) with the global cache enabled

-n jvmMaxHeapSize
The maximum size of the storage available to the JVM, specified in bytes. If you have configured a publish/subscribe domain, when execution groups retain publications, you might need to increase this value. If you have included the XSLTransform node in one or more message flows, and the node is processing very large XML messages, you might also have to change this parameter.
•Value type: integer
•Initial value: -1, which represents 268435456 bytes (256 MB)
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lancelotlinc
PostPosted: Tue Aug 06, 2013 8:57 am    Post subject: Reply with quote

Jedi Knight

Joined: 22 Mar 2010
Posts: 4941
Location: Bloomington, IL USA

YMMV

Do your homework. No one here can possibly know what your performance will be or how to even guestimate the need to change any JVM property.

Only you can know this by experimentation.
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