I run a server having the following plugins: (from bukkit /pl command) Yesterday we had over 20 members online, and it started to lag the FPS down. I had to kill al the entities, use /stoplag command but it was coming back quick after everything went back up.. I think what can cause such a lag is the worldgen I use with terrain control. It looks something like this: (real ingame recordings) The PC that runs the server has the following specs: - AMD Dual Core 1.9Ghz - 2Gb RAM (allocated to the server) - x64 Windows 7 (with Aero effects disabled, explorer.exe not running and the "java.exe" set at high priority in taskmgr. The internet connection I have is a 50mbps down and around 50mbps up with a ping of 3ms (in the same country). The results to New-York were: 150ping, 10mbps down and 20mbps up. Those results were generated by speedtest.net .. I guess this is the worst case, it can go better, idk. I saw at beastnode.com, a server with 1Gb RAM is recommended up to 30 members online, my server has 2Gb and at 20 started to lag? Also there was no continuus lag, it had spikes which took the TPS to 10 and sometimes till 5. Then came back up like if nothing happened. I'm afraid that the server crashed if I leave it by it's own for some time (1hour-2hours..) so this is a pretty big issue. Of course I remove all the entities when that happened. There were around 3500chunks loaded (sometimes up to 3800) and over 2500 entities loaded. (where there were around 20players). If you can help me solve the problem here, I would appreciate so much. Those are the solutions I have though about: - [will try to do it] adding one more Gb or RAM resulting in server allocated 3Gb. (the PC has a maximum of 4Gb capacity, and installed 3Gb). - [cannot do it soon] adding an SSD instead of the harddrive. - [can do it] generating a great part of the world with "worldborder plugin" on my macbook, then upload this file to the server's PC so the server does nt have to generate it when players explore. Thank you for reading this post, and I hope someone can help me find solutions for this issue. Sincerly, 3rd.