Hello ! I am hosting a 54 slots Bukkit server with 23 Plugins, when i hit about 20 players the server begins to lag (19.3 - 18.7 ticks) and when i hit the 50 players the server gets almost unplayable and the server is only using 30 - 35 % of ram. when the lag happens everyone stops and after a few seconds (depends how long on the amount of players) everyone moves on rely fast and goes on normal again and after a minutes or ten it happens again and so on. So my question is , what is cousing this ? i have been struggling on it for a months with out any success. To help you guys help me out im also posting the Speedtest results, plugins and server stats. Speedtest results: 4 ms ping Download speed : 125.74 Mbps Upload speed : 8.25 Mbps Plugin list : CaptureThePoints, CasinoSlots, ChatManager, ChestShop, Citizens, CombatTag, DisguiseCraft, DungeonBuilder, Essentials, EssentialsChat, EssentialsProtect, EssentialsSpawn, factions, Izone, LagMeter,McMMO, Moneydrop, NoCheatPlus, PermissionsEx, SpamGuard, Vault, Worldedit, Worldguard System Stats : System runes on Linux Fedora Intel(R) Xeon(R) 10 Gb Ram 4 Cores 3.10 Ghz Processor number : E3-1220 Cores : 4 Clock speed : 3.10 GHz 64 Bit (Should be enough information) There you go , i need some help and i need it fast. have tried to figure i out for so long but no results. So please help me out here !!!!!!