Hi, well it looks like our environment is running with JVM hotspot CLIENT instead of SERVER. As soon as it will switch to SERVER hotspot I'll let you know how much CPU is using really. As a side note I already setted logging at DEBUG level and JGroups is logging as expected... some messages when it sweeps cache... nothing more to seem suspicious at my eyes. Thanks Bye Piero View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4016252#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...