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I have three producers producing 80K messages every 2 seconds, I have
three consumers subscribed as durable consumers. I am using mysql as
persistence. What I see is that the messages are being written to the
database even when all the subscribers are up. I thought that broker
only writes to the datasource if it has to. Can anyone explain what I am
missing? Here is my configuration: I am using activemq 4.0.1

 

<beans xmlns="http://activemq.org/config/1.0">

 

  <broker useJmx="true" brokerName="cdx-server"
deleteAllMessagesOnStartup="true" persistent="true">

    <persistenceAdapter>

      <journaledJDBC dataSource="#mysql-ds"/>

    </persistenceAdapter>

 

    <transportConnectors>

       <transportConnector name="default" uri="tcp://localhost:9082"/>

    </transportConnectors>

  </broker>

  <bean id="mysql-ds" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">

    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>

    <property name="url"
value="jdbc:mysql://localhost/activemq?relaxAutoCommit=true"/>

    <property name="username" value="transera"/>

    <property name="password" value="transera"/>

    <property name="poolPreparedStatements" value="true"/>

  </bean>

</beans>

 

Ramesh.