Are you shure you have a Problem with retained messages. If you do not have a PM, then all undelivered Messages in the queues will be kept in Memory. So check your queue length (and DLQ) how many of those messages are not delivered at the time of your OOM. Have you used Eclipse MAT do find the Memory Hog and can you idntifiy Messages which should not be there? What kind of OOM you get (are you sure it is not Perm Gen for example?) Gruss Bernd View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4221243#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...