"svadu" wrote : There is also somewhat older article from JBoss about Seam performance, might be interesting as reference information: http://www.dell.com/downloads/global/power/jbossworld_2006_june_jaffe.pdf Thanks for this review, I've already looked at it, but read it once more (in case of..). But doesn't help ;(( page 24 short think time : in fact all vusers involved in all tests had no think time. logging : no log in any my tests (only at startup). client vs server state : server state always used (session size was 180 ko ouch ! for all tests). no ejb : so no call by value problem vusers where between 5 and 15. no load balancing no session replication and no .css or .js or image requested from my vusers ! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4111032#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...