2016年10月18日 星期二

Linux 釋放 cache 記憶體


echo 1 > /proc/sys/vm/drop_caches
To free dentries and inodes:

echo 2 > /proc/sys/vm/drop_caches
To free pagecache, dentries and inodes:

echo 3 > /proc/sys/vm/drop_caches
As this is a non-destructive operation, and dirty objects are not freeable, the user should run "sync" first in order to make sure all cached objects are freed.

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