Insane CPU usage on debian bukkit server

Hey all,

I'm having problems with the CPU usage of a craftbukkit server. After 10+ players join the server, CPU usage goes insane (95+%).



Here's the information needed:

1. Debian 6.0.6
2. x64
3. 1.7.0

Code:

Linux gs-server-1 3.6.8-custom #1 SMP Mon Dec 3 17:26:22 EET 2012 x86_64 GNU/Linux
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode)

4. No
5. 1.4.6-R0.3
6. java -Xmx12G -Xms12G -jar craftbukkit.jar -nojline (tried different variables for Xmx and Xms - none of them helped)
7. -->

Code:

Anti_BlockPhysicsEvent
AntiBot
AntiCreeper
AntiFire
AntiRelog
AuthMe-2.6.6
AutoAnnouncer
ChatManager
ChestShop3-46
CookieMonster
CoreProtect_1.73
CWDeath
EssentialsAntiBuild
EssentialsChat
Essentials
EssentialsProtect
EssentialsSpawn
Factions
FigAdmin
ForgeDeaths
iConomy
Lockette
MobHealth-5.3.3
Modifyworld
Multiverse-Core-2.4
Orebfuscator
PermissionsEx
PlayerHeads
PluginList
PvPTime
Residence
Simple-AutoSave
Timeismoney
Tim
TreeAssist
Vault
WGCommandFlags
WorldEdit
WorldGuard

8. No error logs.
9. Tried using java 1.6.0 and 1.7.0. With 1.7.0 CPU usage is lower, but once 25+ players join, the usage goes insane again. Added -nojline -> no change.
10. No. I haven't

 

That's a lot of unnecessary plugins.
Anti_BlockPhysicsEvent + AntiCreeper + AntiFire --> included in WorldGuard
EssentialsChat -> ChatManager
EssentialsAntiBuild + EssentialsProtect -> Modifyworld, WorldGuard, Lockette
Simple-AutoSave -> bukkit.yml, Essentials (backups section)

I had similar problems, somehow overlappings in the "operational range" of plugins slow down the server.

 

Insane? Not really. When i run a "top" on my Debian dedicated box (4gb ram, 2 cpu) i also have about 50-120 % cpu usage if there are about 10-15 players online. Thats... erm... normal. Do you got lag ingame? Or is it just the "insane" percentage?

 

I got the same equipment, but only 70 - 85% usage with all slots occupied (64)

 

Well, i have 53 plugins running and 10 worlds ingame... In addition: you might have a better CPU than i do

 

No ingame lag. However other game servers on the same machine start having problems (short freezes, higher ping etc..).

 

Inform your hosting provider.

 

So I'll inform myself. Now what ?

 

What CPU model does your server have?

 

E5420 @ 2.50GHz

Just one note: Kernel has been modified and optimized for good HLDS performance.

Code:

xxxx@xxxx~# ps -eo pcpu,pid,user,args | sort -k 1 -r | head -20 | grep java | grep -v grep
184 27557 root    java -Xmx12G -Xms12G -jar craftbukkit.jar -nojline nogui

184, which means 184%, which is insane. Top also shows 150+ CPU %.

 

I really doubt there's no solution for this problem?