Re: Swappiness in Buster

[deloptes <deloptes@gmail.com>]

Martin Reissner wrote:

> Yeah, only talking about server and mostly database applications. I
> usually set it to 1, but even tried 0 which disabled swap completely on
> Stretch but on Buster it didn't make a difference at all, the setting
> seems to be ignored while using default swappiness (60?) since Buster.
> 
> Following output is from a mariadb server that didn't swap at all
> running Stretch.
> 
> root@server:~# cat /proc/sys/vm/swappiness
> 1
> root@server:~# free -tm
> total     used     free   shared  buff/cache   available
> Mem:          48284     9763      707       59       37814       38147
> Swap:         11443     5020     6423
> Total:        59728    14783     7131

May be look deeper in documentation - I recall asking few years ago and was
answered that now it would cache whatever it can and will free on demand.
swap is done only if memory is really insufficient.

I don't recall when or where I asked read this