High Bukkit CPU usage

1. OS: CentOS5.7
2. Arch: x64
3. Java:

Code:

java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.8) (rhel-1.22.1.9.8.el5_6-x86_64)
OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)

4. Wrapper: None
5. Bukkit: 965-1173
6. Command: Have Tried:

• java -Xms512M -Xmx1536M -jar craftbukkit.jar
• java-Xms512M -Xmx1536M -Xincgc -jar craftbukkit.jar
• • java -Xms512M -Xmx1536M -XXermSize=128m -XX:MaxPermSize=256m -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XXarallelGCThreads=1 -XX:MaxGCPauseMillis=50 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -XX:+UseBiasedLocking -XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=15 -Xnoclassgc -XX:UseSSE=3 -XX:+UseFastAccessorMethods -XX:+UseStringCache -XX:+AggressiveOpts -jar craftbukkit.jar

7. Plugins:

Code:

mcbans            : 3.0
WorldEdit         : 4.6
BlockHat          : 1.5
iConomy           : 5.01
WorldGuard        : 5.2.2
Redeemer          : 1.0
ColoredSigns      : 1.1
LogBlockQuestioner: 0.02
RetractableBridge : 1.3.7
MobDisguise       : 1.62
PorteCoulissante  : 1.2.2
Permissions       : 3.1.5
CommandBook       : 1.5.2-customized
BorderGuard       : 4.11
iChat             : 2.3.3-p3
LogBlock          : 1.26
LWC               : 3.5

8. Wrapper: None
9. Tried: I have tried almost everything... No plugins, Vanilla, running on VirtualPC, running on Home PC, ...
10. Tried (in list): Everything in list (It happens in Bukkit and default minecraft. I know this is the Bukkit help section, but I have tried many places and hope that someone here can lead me to a fix.)

I am experiencing very high CPU usage for Vanilla and Bukkit servers. I am getting around 60-100% CPU usage (1 core of a i7 3.0 Ghz)(Happens on virtualized Servers(Xen, VirtualBox)) with 4 people online. The CPU usage of the server when it is empty seems to be around 10%. And seems to increase by 10-15% per player that is online. I have tried almost everything. When I tested an exact copy of the server on my home PC the CPU usage seemed much lower. (for the core Bukkit is running on) I have tried it on my VPS and on a VirtualBox running on my home PC. When running the server on the VirtualBox the CPU usage seems very high. I know this isn't normal. I have heard of many people with this problem. I see many server with similar hardware hosting 30+ people. How would mine get this bad?

 

Why so complicated?

Code:

SET BINDIR=%~dp0
CD /D "%BINDIR%"
"%ProgramFiles%\Java\jre6\bin\java.exe" -Xincgc -Xmx1G -DruFixConsole="Cp866" -DruFixLogFile="Cp1251" -jar craftbukkit.jar
PAUSE

-DruFixConsole="Cp866 - To display the console to another encoding

 

Code:

6. Command: Have Tried:

* java -Xms512M -Xmx1536M -jar craftbukkit.jar
* java-Xms512M -Xmx1536M -Xincgc -jar craftbukkit.jar
* java -Xms512M -Xmx1536M -XX:permSize=128m -XX:MaxPermSize=256m -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:parallelGCThreads=1 -XX:MaxGCPauseMillis=50 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -XX:+UseBiasedLocking -XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=15 -Xnoclassgc -XX:UseSSE=3 -XX:+UseFastAccessorMethods -XX:+UseStringCache -XX:+AggressiveOpts -jar craftbukkit.jar

I have tried all 3. This does not help. Also, I am not on windows, I am CentOS5.7. (That is Batch)

Do you have a VPS or Dedicated?

It's nice to see I'm not alone in this issue and that it isn't because of "slow hardware."

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

@Zachar543
It looks like a problem with your virtual machine.
Virtual machines are, by nature, slow. It requires a program to process OS code to run on an OS to get to the CPU.
There are a lot of processor-heavy computations going on in virtual machines.

I would recommend not using the virtual machine. My server runs fine on an old Pentium IV.

 

A 100Mbit upload connection would cost me around $3000 per month at home. I have plenty of computers, but no bandwidth.

Maybe another flavor of linux would run better?

 

The VM is your problem. Also why are you using a VM to host a minecraft server. Personally I believe that is stupid.

 

@rmb938 @cruisecho Thanks for this information. I did not know that it was not wise to host Minecraft servers off of a VPS.