2 Replies Latest reply on Nov 26, 2012 4:38 AM by Hans-Dieter Mader

    EJB subsystem thread-pool configuration

    Hans-Dieter Mader Newbie

      Hi,

       

      I have a EJB subsystem configured on 7.1.1 Final like this:

       

              <subsystem xmlns="urn:jboss:domain:ejb3:1.2">

                  <session-bean>

                      <stateless>

                          <bean-instance-pool-ref pool-name="slsb-strict-max-pool"/>

                      </stateless>

                      <stateful default-access-timeout="5000" cache-ref="simple"/>

                      <singleton default-access-timeout="5000"/>

                  </session-bean>

                  <pools>

                      <bean-instance-pools>

                          <strict-max-pool name="slsb-strict-max-pool" max-pool-size="20" instance-acquisition-timeout="5" instance-acquisition-timeout-unit="MINUTES"/>

                          <strict-max-pool name="mdb-strict-max-pool" max-pool-size="20" instance-acquisition-timeout="5" instance-acquisition-timeout-unit="MINUTES"/>

                      </bean-instance-pools>

                  </pools>

                  <caches>

                      <cache name="simple" aliases="NoPassivationCache"/>

                  </caches>

                  <passivation-stores>

                      <file-passivation-store name="file"/>

                  </passivation-stores>

                  <async thread-pool-name="default"/>

                  <timer-service thread-pool-name="default">

                      <data-store path="timer-service-data" relative-to="jboss.server.data.dir"/>

                  </timer-service>

                  <remote connector-ref="remoting-connector" thread-pool-name="default"/>

                  <thread-pools>

                      <thread-pool name="default">

                          <max-threads count="100"/>

                          <keepalive-time time="100" unit="milliseconds"/>

                      </thread-pool>

                  </thread-pools>

              </subsystem>

       

      My question is: How can I determine, if the pool size  (max-threads count="100") is sufficient enough?

      Here is a screenshot of JConsole:

      ejb.PNG

       

      Does this stacktrace says anything about performance or wrong config of the EJB subsystem/thread pool?

      I guess, every thread has the same state and is waiting on the same object.

      What does it mean?

       

      Thank you very much for any explanations!!!!