Hi Alex, You could probably be right, if there were same threading and system behaviour between PVM and jBpm. But this not beeing the case, and having proved this situation in our production environments with a simple test (which I will post later this morning, when I have time) in an 8 dual core Itanium with 8Gb ram, the cpu was just laughing at me. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4145058#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...