Inside the AS container, a MDB's connection to JBM is handled by JCA layer, which has its own pooling of connections. JBM_clientMaxPool is not about connection pool, it's about thread pool size at the remoting client side. I don't see what do you refer to the TCP connection pool, can you clarify it? thanks View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4240086#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...