Yesterday I started my server, the map has been fully cleared. At first everything was fine, no lag at all. 19.8/20 mc (Tested at debug clock by CommandBook) (60/60 players) Today, when I went to the server, I noticed that there were huge mob lag, when I again checked the ticks per second by CommandBook, I received (2 / 20) mc, then I rebooted my server, but the number of ticks per second and has not increased... I do something wrong? Or i miss something important? Notice me that pease. Server specs: Ubuntu Server x64, java 7 x64, CB1611 Intel Xeon 5504, 24GB (16gb to server,4gb to system,4gb to ramdisk), HDD + Main World running on 4gb ramdisk. 1gbit connection. Plugins: BadTNT,BlockHat,BorderGuard,CFBanner,ChunkManager,CommandBook,FalseBook,iChat,InventorySave,KiwiAdmin,LoginMessage,NoCheat,NoOrbs,PeX,Residence,ServerLogSaver,serversave,vanish,WorldEdit,xAuth(Running with MySQL) Startup: Code: java -d64 -Xmx16G -XX:ParallelGCThreads=8 -server -Xincgc -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:+AggressiveOpts -XX:+CMSParallelRemarkEnabled -XX:+DisableExplicitGC -XX:MaxGCPauseMillis=500 -XX:SurvivorRatio=16 -XX:TargetSurvivorRatio=90 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -Xnoclassgc -XX:UseSSE=3 -XX:PermSize=512m -XX:LargePageSizeInBytes=8m -jar craftbukkit.jar nogui And: Is there a cron script that can backup world from ramdisk to hdd every 12 hours?