I apologize for the side question but I am looking to find out which JTA TM impl and accompanying XA-capable connection pool folks are using. The reason I am asking this question here is that we had to add JTA TM because it is a prereq for using JBC3 as Hibernate 2nd level cache. (That, in itself, is a little puzzling since afaik, JBC3 acts as a Synchronization, and, as far as I can tell, Hibernate Transcation API has a synchronization-like interface already) I've tested BTM but found it non-performing at scale. Our current stack is: Tomcat 6 NIO JBC 3.0.3.GA Hibernate 3.3.1.GA (using TRANSACTIONAL cache strategy) Spring 2.5.6 Mysql 5.1 INNODB Used to use C3P0 Since we only have 1 Resource (DB), I'd love to make things even simpler and use LRCO. I am assuming many folks here use JBossTM, but it doesn't seem to come with a Connection Pool. thanks! -nikita View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4222392#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...