Re: quincy 17.2.6 - write performance continuously slowing down until OSD restart needed

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On Tue, May 2, 2023 at 7:54 AM Igor Fedotov <igor.fedotov@xxxxxxxx> wrote:
>
>
> On 5/2/2023 11:32 AM, Nikola Ciprich wrote:
> > I've updated cluster to 17.2.6 some time ago, but the problem persists. This is
> > especially annoying in connection with https://tracker.ceph.com/issues/56896
> > as restarting OSDs is quite painfull when half of them crash..
> > with best regards
> >
> Feel free to set osd_fast_shutdown_timeout to zero to workaround the
> above. IMO this assertion is a nonsence and I don't see any usage of
> this timeout parameter other than just throw an assertion.

This was added by Gabi in
https://github.com/ceph/ceph/commit/9b2a64a5f6ea743b2a4f4c2dbd703248d88b2a96;
presumably he has insight.

I wonder if it's just a debug config so we can see slow shutdowns in
our test runs? In which case it should certainly default to 0 and get
set for those test suites.
-Greg

>
>
> --
> Igor Fedotov
> Ceph Lead Developer
>
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