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MQSeries.net Forum Index » IBM MQ Java / JMS » QCF Session conn against Message Listener Port Max Session

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teal
PostPosted: Tue Jan 17, 2006 2:55 pm    Post subject: QCF Session conn against Message Listener Port Max Session Reply with quote

Acolyte

Joined: 15 Dec 2004
Posts: 66
Hello,

I am running WAS 5.1.1.8 with MQ 5.3.10. I have an MDB in my application that will be servicing a single queue with moderate to heavy volume.

The material I have read for configuring the 3 fields: MLP maxsession, QCF conn pool and QCF session pool - is a little vague, some good some okay, I enjoyed the jms topologies from Roland however I am stumped on this.

I set the MLP maxsessions to 20, but for the corresponding QCF (conn pool and session pool Max Connections) I am confused

the QCF conn pool-max connections is for the physical connections so I can set this to 25, but the QCF session pool Max connections should be set to about double the MLP max sessions so it should be set to 40?

I am looking at this from IBM:

http://www-304.ibm.com/jct09002c/isv/tech/faq/individual.jsp?oid=1:82331

Anyone??
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fjb_saper
PostPosted: Tue Jan 17, 2006 3:04 pm    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
I am not too happy with that recommendation because it only takes into account the receiver side.

Now look at the min value for max connections:
receiving : sum(mdb instances) for the same connection.
sending : How many processes / MDBs / EJBs are sending to that same connection ? Add that to the min value for max connections.

But this gives you a min value only. Depending on how big a pool the above number mandates you can double it or add 20 to 50 %.

Now you have to check the max conn / max handles on the MQ Server the connection points to. Due to adding the WEB app (additional load) you may have to reassess those numbers.

Enjoy
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