| From: | Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com> |
|---|---|
| To: | Noah Misch <noah(at)leadboat(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, "Andrey M(dot) Borodin" <x4mmm(at)yandex-team(dot)ru>, Stephen Frost <sfrost(at)snowman(dot)net>, Michael Paquier <michael(at)paquier(dot)xyz>, Amul Sul <sulamul(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pg_amcheck contrib application |
| Date: | 2021-03-16 15:45:28 |
| Message-ID: | 7BCE9084-9381-471F-90F2-FAD99B7FE3DB@enterprisedb.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
> On Mar 15, 2021, at 11:09 PM, Noah Misch <noah(at)leadboat(dot)com> wrote:
>
>> Not sure that I believe the theory that this is from bad luck of
>> concurrent autovacuum timing, though.
>
> With autovacuum_naptime=1s, on hornet, the failure reproduced twice in twelve
> runs. With v6-0001-Turning-off-autovacuum-during-corruption-tests.patch
> applied, 196 runs all succeeded.
>
>> The fact that we're seeing
>> this on just those two animals suggests strongly to me that it's
>> architecture-correlated, instead.
>
> That is possible.
I think autovacuum simply triggers the bug, and is not the cause of the bug. If I turn autovacuum off and instead do an ANALYZE in each test database rather than performing the corruptions, I get reports about problems in pg_statistic. This is on my mac laptop. This rules out the theory that autovacuum is propogating corruptions into pg_statistic, and also the theory that it is architecture dependent.
I'll investigate further.
—
Mark Dilger
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2021-03-16 16:07:35 | Re: pg_amcheck contrib application |
| Previous Message | Masahiko Sawada | 2021-03-16 15:38:29 | Re: New IndexAM API controlling index vacuum strategies |