I have one real Node per Role: Emulator: Intel E6600 @ 2.4 Ghz, 3.00 GB Database: Intel E6600 @ 2.4 Ghz, 3.00 GB Driver: Intel E8400 @ 3.0 Ghz, 3.25 GB Appserver: Intel E8400 @ 3.0 Ghz, 3.25 GB (every CPU has 2 cores) The highest IR I was able to achieve without errors was 20. (The next I tried was 30.) The GlassFish application server was able to perform an IR of 100 and more without any problems. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4224406#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...