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In WebSphere Application Server, what is the difference between the threads in the Thread Pool specified under:

Application servers > server > Message listener service > Thread Pool, threads

and sessions on the Message listener

Application servers > server > Message listener service > Listener Ports > Listener, Maximum sessions/Maximum messages

?

Todd Chambery
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1 Answers1

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This is very brief explanation, you can find some more details here: http://www14.software.ibm.com/webapp/wsbroker/redirect?version=matt&product=was-nd-mp&topic=ListenerPort

Message listener service > Thread Pool - is the pool available for all listener ports

Maximum sessions - is a maximum number of messages processed concurrently (in separate threads) by given listener port

Maximum messages - is a maximum number of massages processed in one transaction in one thread.

PS. Since WAS v7 listener ports are stabilized and for new applications you should use activation specs.

Gas
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  • Re Activation spec: agree. Unfortunately I have a large legacy install running with listener ports, and the requirement was for a drop-in replacement. – Todd Chambery Jun 05 '14 at 09:51