Java Memory Problem

Perhaps it's my inexperience with java, but when I type /memory I get the following:

Maximum memory: 6,107 MB
Allocated memory: 1,037 MB
Free memory: 352 MB
screenshot: http://puu.sh/uais

I'm running this on a CentOS box with 12GB of ram on it and I'd like to give MC at least 6GB of that to play with. What am I missing?

ps: my startup command:

Code:

java -Xmx6G -XX:ParallelGCThreads=8 -server -Xincgc -XX:+UseConcMarkSweepGC -XX:+UsePaNewGC -XX:+CMSIncrementalPacing -XX:+AggressiveOpts -XX:+CMSParallelRemarkEnabled -XX:MaxGCPauseMillis=500 -XX:SurvivorRatio=16 -XX:TargetSurvivorRatio=90 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -Xnoclassgc -XX:UseSSE=3 -XX:PermSize=6G -XX:LargePageSizeInBytes=4m -jar craftbukkit.jar nogui

 

the server has 6GB of ram already.

 

This

Code:

-Xmx6G

is telling Java to only use 6GB, which is exactly what you're reporting, so it's working exactly as one would expect

 

Code:

Free memory: 352 MB

We've actually hit our memory limit and it crashed the server. This tells me that the Free memory is a problem which I can only assume means that java can't get more than 1GB of ram.

 

bump

 

Post your updated startup script and an output of the "free" command.

 

You misunderstand it.
"Maximum memory: 6,107 MB"
Means that the server can only have 6GB RAM max.

"Allocated memory: 1,037 MB"
Means that of the 6GB max that the server can have, it is currently only allocating, or 'asking', to use about 1GB

"Free memory: 352 MB"
Of the 1GB that it allocated, 352MB of it is not being used. Therefore, your server is really only using about 700MB/6107MB of RAM.