Date: Mon, 09 Sep 2019 23:04:47 +0100
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Subject: Re: pgsql: Reorder EPQ work,
 to fix rowmark related bugs and improve effici
To: Tom Lane <tgl@sss.pgh.pa.us>
CC: pgsql-committers@lists.postgresql.org,Thomas Munro
 <thomas.munro@gmail.com>
From: Andres Freund <andres@anarazel.de>
Message-ID: <A1A957CC-C1E5-4164-A7DB-8BA418D50055@anarazel.de>
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Hi,

On September 9, 2019 11:01:28 PM GMT+01:00, Tom Lane <tgl@sss=2Epgh=2Epa=
=2Eus> wrote:
>Andres Freund <andres@anarazel=2Ede> writes:
>> On September 9, 2019 10:51:26 PM GMT+01:00, Thomas Munro
><thomas=2Emunro@gmail=2Ecom> wrote:
>>> On Tue, Sep 10, 2019 at 12:32 AM Andres Freund <andres@anarazel=2Ede>
>>> Did this cause the following failure in eval-plan-qual on
>>> REL_12_STABLE?
>>>
>https://buildfarm=2Epostgresql=2Eorg/cgi-bin/show_log=2Epl?nm=3Dprairiedo=
g&dt=3D2019-09-09%2019%3A08%3A41
>
>Just saw that :-(
>
>> Argh, yes, probably=2E But it's just isolationtester I think, not a
>backed bug=2E Need to backport the recent fix in master to at least 12=2E
>> Tom, do you think we should backpatch both the order fix and the
>notice improvement, or just the former? And to which version?
>
>I think the first question is why is only prairiedog showing this=2E

We only saw the similar failure on master on a very small number of machin=
es as well=2E Given The somewhat unusual way packets have to go out to be l=
ikely to be problematic, that's not too surprising=2E


>Let's not panic until we understand that=2E

If it's the packet ordering thing in isolationtester, then I think there's=
 no need to panic, personally=2E And the output does look a lot like that=
=2E


>prairiedog looks to be about 20 minutes away from finishing the
>isolation tests for master, so that will be a useful data point
>as to whether there's any 12/HEAD difference=2E  I'll dig deeper
>as soon as that run finishes=2E

Cool=2E

Andres
--=20
Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E