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List:       fedora-devel-list
Subject:    Re: Fedora 32 System-Wide Change proposal (late): Enable EarlyOOM
From:       drago01 <drago01 () gmail ! com>
Date:       2020-01-10 21:42:08
Message-ID: CAMqY-FdwO8DxeDyBU1vgHJijrk3zDKyNWMvgDs2=PFknM85Z5w () mail ! gmail ! com
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On Wed, Jan 8, 2020 at 8:25 PM Chris Murphy <lists@colorremedies.com> wrote:
>
> On Mon, Jan 6, 2020 at 11:09 AM Lennart Poettering <mzerqung@0pointer.de> wrote:
> >
> > - facebook is working on making oomd something that just works for
> >   everyone, they are in the final rounds of canonicalizing the
> >   configuration so that it can just work for all workloads without
> >   tuning. The last bits for this to be deployable are currently being
> >   done on the kernel side ("iocost"), when that's in, they'll submit
> >   oomd (or simplified parts of it) to systemd, so that it's just there
> >   and works. It's their expressive intention to make this something
> >   that also works for desktop stuff and requires no further
> >   tuning. they also will do the systemd work necessary. time frame:
> >   half a year, maybe one year, but no guarantees.
>
> Looks like PSI based oom killing doesn't work without swap. Therefore
> oomd can't be considered a universal solution. Quite a lot of
> developers have workstations with quite a decent amount of RAM,
> ~64GiB, and do not use swap at all. Server baremetal are likewise
> mixed, depending on workloads, and in cloud it's rare for swap to
> exist.
>
> https://github.com/facebookincubator/oomd/issues/80
>
> We think earlyoom can be adjusted to work well for both the swap and
> no swap use cases.

How? On a system with 64GB of ram and no swap all it does currently is
reducing the amount of usable memory significantly.
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