[squid-users] memory usage

[Amos Jeffries]

On 06/10/17 20:27, Vieri wrote:
> OK, I guess I'm starting to understand how Linux manages disk caching, and the meaning of "buffered".
> In fact:
> 
> # free -m
>               total        used        free      shared  buff/cache   available
> Mem:          32094        2799        1074         154       28220       28810
> Swap:         36168         168       36000
> 
> ...so I have 28810MB RAM available.
> 


Well, sort of. You have 1074 MB free for use if anything wants it 
immediately. The rest of the 28810 MB is being used by the kernel as 
temporary storage for open disk files etc and will take some cycles to 
clean out before it can be used by other things. So it is available for 
allocation to programs, but the alloc will be somewhat slow.

(It's been a few decades since I dealt with these things in detail, so 
I'm not sure exactly on best practice with these GB-sized machines. But 
that looks reasonably healthy to me: 1GB RAM free and almost no swapping.)

Amos