Different performance on two systems is mostly based on the hardware used The operating system only has minor influence on it. So you showed us you have 16 CPUs in your Solaris box. But what kind of CPU? Show us the head output of prtdiag. What's the CPU used for your Linux box? Don't know much about JMeter. How many threads do you use? If you increase threads, the Solaris box should scale well, if your test application is good. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048936#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...