Configure MDB PoolSize

[ejb3workshop]

I would like to increase the default number of MDBs per pool. Using the jmx-console I found that the MaxPoolSize is set to 15. I have tried making various changes to ./conf/standardjboss.xml however none have allowed me to increase the number of MDB instances in my pool. I have found this http://www.jboss.org/ejb3/docs/reference/build/reference/en/html/session-bean-config.html, but I am hoping for easier way to increase my global default pool size.

I know about using annotations, but I want to set the global pool size for all MDBs. This is for two reasons:

1.) I want to be able to change my pool size without having to reconfigure / redeploy my application

2.) Change all MDBs in one central place

Thanks in advance.

Alex

[jaikiran]

This is more of a EJB3 question and would be better in the EJB3 user forum. Which version of JBoss AS do you use?

[ejb3workshop]

I will raise it on that forum as well. I am using 4.2.3 with JBM 1.4.2-SP1

Thanks

Alex

[jaikiran]

ejb3workshop wrote:

I will raise it on that forum as well.

Don't worry, some moderator will move this thread there.

I am using 4.2.3 with JBM 1.4.2-SP1

Thanks

Alex

You can change the value in JBOSS_HOME/server/< servername>/deploy/ejb3-interceptors-aop.xml:

<domain name="Message Driven Bean">
      <bind pointcut="execution(public * @javax.annotation.security.RunAs->*(..))">
         <interceptor-ref name="org.jboss.ejb3.security.RunAsSecurityInterceptorFactory"/>
      </bind>
      <bind pointcut="execution(public * *->*(..))">
         <interceptor-ref name="org.jboss.ejb3.stateless.StatelessInstanceInterceptor"/>
         <interceptor-ref name="org.jboss.ejb3.tx.TxInterceptorFactory"/>
         <interceptor-ref name="org.jboss.ejb3.AllowedOperationsInterceptor"/>
         <interceptor-ref name="org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor"/>
         <interceptor-ref name="org.jboss.ejb3.interceptor.EJB3InterceptorsFactory"/>
      </bind>
      <annotation expr="!class(@org.jboss.annotation.ejb.PoolClass)">
         @org.jboss.annotation.ejb.PoolClass (value=org.jboss.ejb3.StrictMaxPool.class, maxSize=15, timeout=10000)
      </annotation>
   </domain>

Change the maxSize value (default=15) to a value of your choice

[ejb3workshop]

Thanks, just what I was looking for.

[harishpandya]

Hi jaikiran,

                i want to use concurrency using JMS so i used topic implementation of JMS.

My standardjboss.xml is

<proxy-factory-config>
        <JMSProviderAdapterJNDI>DefaultJMSProvider</JMSProviderAdapterJNDI>
        <ServerSessionPoolFactoryJNDI>StdJMSPool</ServerSessionPoolFactoryJNDI>
        <CreateJBossMQDestination>true</CreateJBossMQDestination>
        <!-- WARN: Don't set this to zero until a bug in the pooled executor is fixed -->
        <MinimumSize>2</MinimumSize>
        <MaximumSize>2</MaximumSize><!--how many parellel need for FPM -->
        <KeepAliveMillis>150000</KeepAliveMillis>
        <MaxMessages>15</MaxMessages>
        <MDBConfig>
          <ReconnectIntervalSec>10</ReconnectIntervalSec>
          <DLQConfig>
            <DestinationQueue>queue/DLQ</DestinationQueue>
            <MaxTimesRedelivered>10</MaxTimesRedelivered>
            <TimeToLive>0</TimeToLive>
          </DLQConfig>
        </MDBConfig>
      </proxy-factory-config>

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

Ex.

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.