Linux 释放内存方法 

 先看看内存使用状况[root@node1 ~]# free -mtotal used free shared buffers cachedMem: 8004 6557 1446 0 163 5630-/+ buffers/cache: 763 7240Swap: 1983 0 1983把内存里的数据暂时写到硬盘里[root@node1 ~]# sync修改 /proc/sys/vm/drop_caches文件[root@node1 ~]# echo 3 > /proc/sys/vm/drop_caches[root@node1 ~]# cat /proc/sys/vm/drop_caches再看内存 [root@node1 ~]# free -m             total       used       free     shared    buffers     cachedMem:          4051       1649       2401          0        202       1239-/+ buffers/cache:        208       3842Swap:         5535          0       5535

[root@node1 ~]#free -m             total       used       free     shared    buffers     cachedMem:          4051        139       3911          0          0         21-/+ buffers/cache:        117       3933Swap:         5535          0       5535

[root@node1 ~]#