"gaohoward" wrote : I know in JBoss Remoting there is difference in handling VM local and remote calls. But I don't know about the details. You can ask the remoting forum or the remoting doc. In JBM doc, you can also find some of the key remoting parameters too. | | Howard | Since my case is in JVM I really don't see how remoting has anything to do with it, and right in the jms-ds.xml file is the maxPoolSize parameter. Right now, my assumption is the maxPoolSize paramter in jms-ds.xml is controlling the server thread pool for in JVM calls, but it would be nice to know that without digging through the source. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4241188#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...