JBM knows nothing about MDBs, MDBs and all their configuration params are part of the app server, and not part of JBoss Messaging. All JBM knows about is message consumers, and has no idea of whether the consumer is an MDB or some other kind of consumer. JBM determines if a consumer is busy on whether its buffer is full. If you round robin on consumption too, it won't help you since those machines with smaller or fewer cpus will get, on average the same number of consumers on them, exactly as if you consuming from the local node. So I don't think that helps you. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4158828#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...