"timfox" wrote : For persistent messages, you are fundamentally limited by the speed of your database. | | So your persistent message throughput will entirely depend on how your Oracle box is set-up tuned etc. Oracle is very tunable however. For persistent messages in the AUTO_ACK mode, you are limited by your hard disk performance. The database has to perform sync writes per each message, so I doubt Oracle has any advantage/disadvantage in comparison to other databases. But, what about non_persistent messages ? In the current JM implementation non_persistent delivery performance seems to be determined by the relational database backend too as I wrote earlier, though it does not suffer from sync writes as much as persistent delivery does. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4128523#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...