Ran JMeter on my laptop (dual core AMD) and JBossAS on my desktop (quad core Intel). Laptop showed about 70-80% CPU usage. Desktop barely registered 10% usage. I was getting 333 requests/second. Hmm, that was using wireless on my laptop. Turned off wireless and used a wired connection. Now my laptop shows 100% CPU (desktop 10-15% CPU) and I got 534 requests/second. Have you tried running JMeter on the CentOS box? That would at least eliminate the network as a possibility. In JMeter, when you specify the host, do you use hostname or IP address? How many routers/switches are you going through between the JMeter and JBossAS boxes? Do other network operations run acceptably on the CentOS box? Things like ftping a large file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160994#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...