Thank you, Clebert. It works. A follow up question is when I benchmark JBM 2.0.0.Alpha1, the throughputs for persistent delivery and non-persistent delivery are close. You know generally persistent delivery should be much slower than non-persistent one. Then I go back to your documentation. I am wondering whether persistent delivery is non-blocking by default. What's blocking and non-blocking? How to configure it? Test 5. Persist/Blocking/NonTX/AutoAck 1,265 Test 6. Persist/Non Blocking/NonTX/AutoAck 12,056 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4165412#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...