How to Clear Cache in Linux

16 Sep 2015

It should be much more safer to sync the data to disk before clear the caches.

sync

1) Clear PageCache only.

echo 1 > /proc/sys/vm/drop_caches

2) Clear dentries and inodes.

echo 2 > /proc/sys/vm/drop_caches

3) Clear PageCache, dentries and inodes.

echo 3 > /proc/sys/vm/drop_caches