I'm having problems with lag. I have 50 players on the server alot of the time. I have plenty of banwidth, cpu is only half used and RAM is only half used. I have a 6000 block diameter world and I think the lag might be caused by chunks staying loaded or something because I tried using a smaller world and there was no lag. I have tried a RAM Disk and the lag was still there. Do you have any ideas for me to try? I'm going to try upgrading my java to Java 7 now.