On 05/04/2022 14:58, Laurence Perkins wrote:
-----Original Message-----
From: Dale <rdalek1...@gmail.com>
Sent: Monday, April 4, 2022 4:37 PM
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] LVM and moving things around
One thing that annoys me, it trying to use swap. I don't want to disable it
because on occasion Firefox goes nuts and starting hogging memory really bad.
I have swappiness set to like 5 or something which means it shouldn't use it
but when using rsync, it creeps some in. When it does, that results in some
slowness. I have a little script thing that clears all that but still, I may
set it to 3 or maybe 2 for a bit. Me ponders the thought.
I'm making progress. Feel sorry for those hard drives tho. ;-)
Dale
:-) :-)
I'm told that you can use cgroups for dealing with that kind of thing such
that, for example, only Firefox is allowed to be swapped. I haven't had time
to dig into it, but it seems like a useful tool.
Also, the compressed swap and zram swap devices with backing stores offer a
fairly significant boost to the speed of swap so long as the data being swapped
is compressible.
I don't know how you take advantage of it, but linux by default caches
disk i/o. You can tell it to "don't cache" and apparently it makes a
major difference. Given that rsync reads once and then never uses it
again, you don't want it cached.
I guess that would improve things for you massively if you could use it.
Cheers,
Wol
