You have zero dropped requests and I would benchmark using Siege and compare with other similar setup. Also what kind of system are you using? Probably you also need to increase file descriptor for this to work. Also you need to configure JVM before doing benchmark. Something along these lines:
-server -Xms2048m -Xmx2048m -XX:+UseParallelGC -XX:+AggressiveOpts -XX:+UseFastAccessorMethods
