I want to know how to clean memory and cache.

betoco · 12-14-2013, 03:41 PM

Hello,

I´ll appreciate if you can help me with the following or derivate to the correct group.

I always clean memory and cache memory using the command "sync ; echo 3 > /proc/sys/vm/drop_caches", but this command doesn´t work in one of my Linux server, the "uname -a" command of this server is:

Linux Server 2.4.21-47.ELsmp #1 SMP Wed Jul 5 20:30:47 EDT 2006 i686 athlon i386 GNU/Linux

Could you say me what is the correct way to clean memory and cache in this type or version of the RedHat Linux?

Thanks in advance.
acc

berndbausch · 12-15-2013, 03:23 AM

Quote:

Originally Posted by betoco

I always clean memory and cache memory using the command "sync ; echo 3 > /proc/sys/vm/drop_caches", but this command doesn´t work in one of my Linux server, the "uname -a" command of this server is:

Linux Server 2.4.21-47.ELsmp #1 SMP Wed Jul 5 20:30:47 EDT 2006 i686 athlon i386 GNU/Linux

Could you say me what is the correct way to clean memory and cache in this type or version of the RedHat Linux?

According to man proc, drop_caches was introduced in 2.6.16. It's used to release currently unused memory from some file-system-related caches.
Unused cache memory is automatically released when needed. For the same result, you could run a program that allocates and touches a lot of memory.

chrism01 · 12-23-2013, 04:49 AM

Quote:

I always clean memory and cache memory ...

Why would you do this?

Also can you provide the o/p of

Code:

cat /etc/*release*