How to clear memory cache in Linux

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Is there any command that by using I can clean the cache in RHEL

I used this command

sync; echo 3 > /proc/sys/vm/drop_caches

but it didn't work

Means command executed successfully but results didnt changed. Means the Cache Memory remained occupied.
What's wrong with having something cached? It could speed up access to the cached data.

Renan · Accepted Answer · 2012-12-15 16:27:50Z

up vote 2 down vote accepted

Try sync; echo 1 > /proc/sys/vm/drop_caches.

edited Dec 15 '12 at 16:27

Renan
8,20641943

answered Dec 15 '12 at 16:06

Lennon Chia
584

1 Answer