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I see the following output:

[root@Dummy ~]# free -mt
             total       used       free     shared    buffers     cached
Mem:          3820       3784         36          0          9       2847
-/+ buffers/cache:        927       2893
Swap:         4031       4031          0
Total:        7852       7816         36

Can anyone tell me why all the swap is in use while there is 2.8GB used for caching? Oracle database is running on it.

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Are you using Oracle Automatic Memory Mangagement (AMM)? Can you show the output of df -h? –  ewwhite Jul 16 '13 at 4:17

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