Cache Memory Growing very fast Cent Os -Tomcat

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i am running Java application on Tomcat-6 on CentOs .

JAVA_OPTS Like this : 

 JAVA_OPTS="$JAVA_OPTS -Dorg.apache.catalina.security.SecurityListener.UMASK=`umask` -server -Xms256m -Xmx2536m -XX:+UseParallelGC  -XX:ParallelGCThreads=2  -XX:+UseParallelOldGC  -XX:ThreadStackSize=512 -XX:MaxPermSize=1024M"

but cache memory of server growing 

            total       used       free     shared    buffers     cached
Mem:         32101      16153      15948          0         20       3968
-/+ buffers/cache:      12164      19936
Swap:        16383        114      16269

where i am doing wrong ??

Answer

You’re doing nothing wrong. “Cached” memory in Linux is the kernel using available RAM to cache files from disk, for speedy access( no need to go to slow disk for commonly accessed files). This is by design, and a good thing.

Attribution
Source : Link , Question Author : Bhavesh , Answer Author : Craig Miskell

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