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[root@node1 ~]# free -m
total used free shared buffers cached
Mem: 8004 6557 1446 0 163 5630
-/+ buffers/cache: 763 7240
Swap: 1983 0 1983
°ÑÄÚ´æÀïµÄÊý¾ÝÔÝʱдµ½Ó²ÅÌÀï
[root@node1 ~]# sync
ÐÞ¸Ä /proc/sys/vm/drop_cachesÎļþ
[root@node1 ~]# echo 3 > /proc/sys/vm/drop_caches
[root@node1 ~]# cat /proc/sys/vm/drop_caches
ÔÙ¿´ÄÚ´æ
[root@node1 ~]# free -m
total used free shared buffers cached
Mem: 8004 631 7372 0 0 60
-/+ buffers/cache: 570 7433
Swap: 1983 0 1983


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