I got my application working under JBoss 5.1.0. The test with a load of 100 requests per second already failed (java.lang.OutOfMemoryError: PermGen space). I didn't tune JBoss, that could make a difference but probably not a very big one. Aren't there any performance testing results available which could give an idea of which throughput could be expected of a certain type of application deployed under JBoss? Regards, Erwin View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4269002#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...