2014-12-13 08:03:10

by Manish Yadav

Subject: need help to clear kernel (2.6.16.17) cached memory

Hi,

on my system (based on 2.6.16.17), i am trying to clear the cached
memory but it is not being cleared.

mars# free -m
total used free shared buffers cached
Mem: 925 459 465 0 0 231
-/+ buffers/cache: 228 697
Swap: 0 0 0
mars# sync && echo 3 > /proc/sys/vm/drop_caches
M1450-mrakesh# free -m
total used free shared buffers cached
Mem: 925 459 466 0 0 231
-/+ buffers/cache: 227 697
Swap: 0 0 0
mars#

could you please let me know what i am missing here? as per my
investigation writing 3 to drop_caches should clear the cached memory.

thanks,
manish

2014-12-14 18:17:17

by Bruno Prémont

Subject: Re: need help to clear kernel (2.6.16.17) cached memory

Hi,

On Sat, 13 December 2014 Manish Yadav <[email protected]> wrote:
> on my system (based on 2.6.16.17), i am trying to clear the cached
> memory but it is not being cleared.
>
> mars# free -m
> total used free shared buffers cached
> Mem: 925 459 465 0 0 231
> -/+ buffers/cache: 228 697
> Swap: 0 0 0
> mars# sync && echo 3 > /proc/sys/vm/drop_caches
> M1450-mrakesh# free -m
> total used free shared buffers cached
> Mem: 925 459 466 0 0 231
> -/+ buffers/cache: 227 697
> Swap: 0 0 0
> mars#
>
> could you please let me know what i am missing here? as per my
> investigation writing 3 to drop_caches should clear the cached memory.

Any tmpfs around that would be filled with the remaining cached data?

> thanks,
> manish

Cheers,
Bruno