Which listener are you using? Why do I ask? Well, I used the Summary Report listener. It said Throughput = 2.0/sec (running a single thread for 200 requests) and = 44.0/sec (running 10 threads for 200 requests). The problem is, my 1 thread run lasted less than 1 second, and the 10 thread run about 3 seconds. I then used the Graph Results listener and it says 41,039/min (=683/sec), which is closer to the truth. My CPU usage does hit 99%. I decided to do a longer run - 10000 requests. This lasted 3 min 25 secs (100,000/205=487.8/sec). This time the Summary Report was more correct, Throughput = 482.9/sec. By the way, I have a Core 2 Quad processor, and am running JDK 1.5.0_15 (64-bit version) on Vista 64. Unfortunately, I noticed after doing this run that my servlet was writing to the console log, which probably slowed things down tremendously. I noticed that 3 times the CPU was pegged at 100% for several seconds, but was mostly ran around 60-70%. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160395#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...