How to Clear RAM Memory Cache, Buffer and Swap Space on Linux

admin

7 years ago

Every Linux System has three options to clear cache without interrupting any processes or services.

1. Clear PageCache only.

# sync; echo 1 > /proc/sys/vm/drop_caches

2. Clear dentries and inodes.

# sync; echo 2 > /proc/sys/vm/drop_caches

3. Clear PageCache, dentries and inodes.

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

If you want to clear Swap space, you may like to run the below command.

# swapoff -a && swapon -a