CPU Strikes Up Causes Lag When 2 GB Real Memory

Okay I dedicated 5gb memory to the server. Every time the server hits 2gb in real memory CPU strikes up causes Lag to occur enough to crash the server. What the hell? Anyone know whats wrong?

Running on my iMac 27 inch 16gb ram internet speed is 100 down n 80 up.

 

Could we possibly get the craftbukkit build # and a list of plugins?

 

Oops sorry, build #818 plugins are: assign permissions, bananachunk, bigbrother, craftbook, daily bonus, essentials, heavenlymob, humiliation, iconomy, iconomychestshop, lwc, nocheat, odditem, permissions, playerinfo, spyer, tetris, weather control, world edit, world guard

 

Essentials may be using a lot of memory, also once you switch to CommandBook, you don't need weather control. Tetris might also be using some extra resources.

What do you launch the server with? I bet you aren't using garbage collection which is clogging up the ram.

 

Thanks for the reply I start it up like this: java -server -Xmx5120M -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XXarallelGCThreads=2 -XX:+AggressiveOpts -jar CraftBukkit.jar nogui

If I have to dedicate more ram or change the way I start it up let me know thanks a lot

 

Try:

java -server -Xincgc -Xmx5G -Djava.net.preferIPv4Stack=true -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XXarallelGCThreads=8 -XX:+AggressiveOpts -XX:+CMSParallelRemarkEnabled -XX:+DisableExplicitGC -XX:MaxGCPauseMillis=500 -XX:SurvivorRatio=16 -XX:TargetSurvivorRatio=90 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -Xnoclassgc -XX:UseSSE=3 -XXermSize=128m -XX:LargePageSizeInBytes=4m -jar craftbukkit-0.0.1-SNAPSHOT.jar nogui

Note: You may need to remove -server

 

gave me : Unrecognized option: -XXParallelGCThreads=8
Could not create the Java virtual machine.

 

Remove that then, Mac OSX comes with Apple's Java and it's no where near as good as the official Oracle Java. I suggest you install Ubuntu 64bit!

 

Code works now forgot ":" in some places

 

Would that code also work for windows ?

 

It is Java, it'll work on everything...

 

Macs are wierd - It might have had something specificly for mac that wouldn't work on windows.

 

It's not Macs, it's the Java that runs on it.

 

Depending on how many players you have, it might be nocheat. NoCheat checks a lot of things, and the more players the more lag. Big brother can also be a big resource hog if you have it logging a lot.

 

Ya we clean out the Big Brother database every time it hits around 4 million, but we do back them up. We have around 15-25 players on at a time.

 

Op, report yourself on this thread. http://forums.bukkit.org/threads/the-high-cpu-usage-thread-again.18898/
We are many having the same problem.