Re: [PATCH] postgresql_server / db-koji01: Adjust a bunch more for performance.

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On Mon, 14 Oct 2019 at 06:22, Miroslav Suchý <msuchy@xxxxxxxxxx> wrote:
>
> Dne 11. 10. 19 v 17:28 Kevin Fenzi napsal(a):
> > config and drop the vm back to 32gb memory, but it seems kind of crazy
> > that more memory would cause more slowness. ;(
>
> Can this be caused by swappiness? More memory, the same swappiness ratio, it can cause more IO. I would try to lower
> swappiness.
> #just wild guess
>

I looked and the system isn't hitting swap much, so not sure if that
is the cause or not. Looking at atop most of the problem seems to be
that the Disks are at 74% capacity

LVM | Group00-root |  busy     74% | read   87880 |               |
write    761 | KiB/r     18  | KiB/w      8 | MBr/s  159.1 |  MBw/s
0.6 |              | avq    14.45  | avio 0.08 ms |
DSK |          vda |  busy     73% | read   87879 |               |
write    760 | KiB/r     18  | KiB/w      8 | MBr/s  159.1 |  MBw/s
0.6 |              | avq    13.80  | avio 0.08 ms |

I am not sure how it gets those numbers but it looks like it is 'busy'
trying to get stuff done but isn't doing anything.

> --
> Miroslav Suchy, RHCA
> Red Hat, Associate Manager ABRT/Copr, #brno, #fedora-buildsys
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-- 
Stephen J Smoogen.
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