RAM Using too much !! Need Helps

Hello,
My server is using too much RAM cached,

[root@rbi0133 ~]# free
total used free shared buffers cached
Mem: 3764420 3258004 506416 0 103276 2571864
-/+ buffers/cache: 582864 3181556
Swap: 2031608 192 2031416

Anyone can help me for configuration RAM ?
Thanks

 

 

 

 

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