Hi, you could use the following properties in the sun-ejb-jar to control the MDB pool
<sun-ejb-jar>
<enterprise-beans>
<ejb>
<bean-pool>
<steady-pool-size>10</steady-pool-size>
<resize-quantity>2</resize-quantity>
<max-pool-size>30</max-pool-size>
<pool-idle-timeout-in-seconds>60</pool-idle-timeout-in-seconds>
</bean-pool>
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