[jboss-user] [JBoss Messaging] - Re: Configure MDB PoolSize

Harry P. do-not-reply at jboss.com
Thu Sep 8 04:21:05 EDT 2011

Harry P. [http://community.jboss.org/people/harishpandya] created the discussion

"Re: Configure MDB PoolSize"

To view the discussion, visit: http://community.jboss.org/message/625437#625437

Hi jaikiran,

                i want to use concurrency using JMS so i used topic implementation of JMS.
My standardjboss.xml is

        <!-- WARN: Don't set this to zero until a bug in the pooled executor is fixed -->
        <MaximumSize>2</MaximumSize><!--how many parellel need for FPM -->

Concurrency is achieved. But the problem is that concurrency is applied to a fixed no of messages after that remaining messages are taken sequentially. 

No. of messages on topic(range)                             Connecurrency performed for message                         Sequential
                 11-15                                                                       4 (2 parellel)                                                 7-11
                21-24                                                                       10(5 parellel)                                                11-15

                25-29                                                                       18(9 parellel)                                                7-11
                35-40                                                                       34(17 perellel- best perf.)                              1-6

do you know why such pattern is followed & can we restrict it.

Thanks in Advance.

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