Are you guys using OpenJDK? (if using linux type "java -version" into terminal) OS? (If using linux type "lsb_release -a") CPU? (type "cat /proc/cpuinfo") Ram? 32 or 64 bit? (type "uname -m") ________ My specs Java: java version "1.6.0_20" OpenJDK Runtime Environment (IcedTea6 1.9.8) (6b20-1.9.8-0ubuntu1~10.04.1) OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode) OS: Ubuntu 10.04.1 LTS CPU: Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GH Cache: 3072 KB RAM: 8gb vps, 3 dedicated to minecraft Bit: 64bit We are going to find this problem =P. If its Java garbage collector, why does it work well for some adn not others. Is this related to anything? Possible OpenJDK? Your problem might just be that your over using your ram. That's a lot of plugins for 2gb of ram. Its also possible your power settings might be halving your cpu if the computer is idle. Or something else of this type. Turn off screen savers, make sure the computer isnt set to hibernate, so on so forth. EDIT by Moderator: merged posts, please use the edit button instead of double posting.