# echo 1 > /proc/sys/vm/drop_caches
[ 사용 방법 ]
•echo 1 > /proc/sys/vm/drop_caches
To free dentries and inodes: (트리와 아이노드 클리어)
•echo 2 > /proc/sys/vm/drop_caches
To free pagecache, dentries and inodes: (1번과 2번 모두 클리어)
•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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