@Andy Whitcroft: I don't agree with your conclusion.
I've applied a swappiness reduction (from 60 to 10, and sometimes even
from 60 to 1) on a whole range of various computers. Some 30 or 40
computers in total.
On *all* of those machines I saw a noticeable performance increase. On
some machines, with 512 MB RAM or less, the performance increase was
even spectacular.
It appears form my own, rather extensive, practical experience, that a
swappiness of 10 is a good default for desktops. On 512 MB RAM or less,
a swappiness of 1 is even better. This is confirmed by numerous reports
on the Dutch Ubuntu forum, of which I'm an active member.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/516834
Title:
bad default swappiness for desktop systems
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