[root@local-mgt01 ~]# free
total used free shared buffers cached
Mem: 1026888 187800 839088 0 3768 26868
-/+ buffers/cache: 157164 869724
Swap: 2097144 0 2097144
[root@local-mgt01 ~]# time find /
real 2m17.450s
user 0m0.172s
sys 0m13.328s
[root@local-mgt01 ~]# free
total used free shared buffers cached
Mem: 1026888 278308 748580 0 80016 27140
-/+ buffers/cache: 171152 855736
Swap: 2097144 0 2097144
[root@local-mgt01 ~]# time find /
real 0m21.500s
user 0m0.105s
sys 0m2.889s
キャッシュクリア
[root@local-mgt01 ~]# echo 3 > /proc/sys/vm/drop_caches
[root@local-mgt01 ~]# free
total used free shared buffers cached
Mem: 1026888 196088 830800 0 2852 26864
-/+ buffers/cache: 166372 860516
Swap: 2097144 0 2097144
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