Please correct the above : the correct JVM setting that allows us to run our test is : | jvm_args: -Dprogram.name=pdm.bat -Xms768m -Xmx768m -XX:PermSize=512m -XX:MaxPermSize=512m -XX:+Dis | | ableExplicitGC | However, if this works for 5, 10, 20 simulatenous users, it eventualy crashes when we reach 30 users. So this definitely is a showstopper for us. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4185331#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...