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

By: Boca

Boca — Tue, 10 Jan 2023 15:14:28 +0000

I use:
# echo 3 > /proc/sys/vm/drop_caches && swapoff -a && swapon -a && printf ‘\n%s\n’ ‘Ram-cache and Swap Cleared’
(Note: dphys-swapfile swapon)

Second: It also kills zram so you need to (re)start zram again.

By: alex

alex — Wed, 09 Nov 2022 09:48:48 +0000

In reply to les.

$ sync; echo 1 | sudo tee /proc/sys/vm/drop_caches

By: gollum53

gollum53 — Mon, 03 Oct 2022 14:09:44 +0000

It will result in a server crash and corrupt the database.

Can you please explain this? Why clearing cache could crash the server and corrupt the database?

Thanks

By: A

Tue, 30 Aug 2022 20:35:23 +0000

In reply to Richard.

It could also be useful for cases where garbage collection isn’t functioning properly in certain apps, and the RAM isn’t reclaimed on time, as I had found out on my system.

By: A

Tue, 30 Aug 2022 20:33:23 +0000

In reply to les. Same here. You first need to drop into a root shell (hence the "#" in the article) via "sudo su", and only then will it work.