anonymous wrote : 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. Yes... we are doing a lot of work on the journal, to make it run almost as fast as NonPersistent. anonymous wrote : 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? | It is asynchronous by default. Look at jbm-jndi.xml. There is a ConnectionFactory called MyExampleConnectionFactory that would have some options you could change synchronous to asynchronous on NPersistent and Persistent Messages. You can set anything around that in your connectionFactory. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4165432#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...