linux下释放cache内存
9 66 182 0 0 11
-/ buffers/cache: 55 194 Swap: 511 0 511 再来运行free命令,发现现在的used为66MB,free为182MB,buffers为0MB,cached为11MB.那么有效的释放了buffer和cache. 有关/proc/sys/vm/drop_caches的用法在下面进行了说明 /proc/sys/vm/drop_caches (since Linux 2.6.16) Writing to this file causes the kernel to drop clean caches, dentries and inodes from memory, causing that memory to become free. To free pagecache, use echo 1 > /proc/sys/vm/drop_caches; to free dentries and inodes, use echo 2 > /proc/sys/vm/drop_caches; to free pagecache, dentries and inodes, use echo 3 > /proc/sys/vm/drop_caches. Because this is a non-destructive operation and dirty objects |
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