linux cache的問題實驗

sync

[root@CRRACTEST vm]# free
total used free shared buffers cached
Mem: 8033864 7967560 66304 0 18212 7544800
-/+ buffers/cache: 404548 7629316
Swap: 2031608 140 2031468
[root@CRRACTEST vm]# echo 3 >drop_caches
[root@CRRACTEST vm]# free
total used free shared buffers cached
Mem: 8033864 349108 7684756 0 292 40212
-/+ buffers/cache: 308604 7725260
Swap: 2031608 140 2031468
[root@CRRACTEST vm]#


ref:http://qustion1234.blogspot.com/2008/03/linux-cache.html
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