Horton

Re: Berserk Autovacuum (let's save next Mandrill)

David Rowley <dgrowleyml@gmail.com>

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From: David Rowley <dgrowleyml@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Laurenz Albe <laurenz.albe@cybertec.at>, Andres Freund <andres@anarazel.de>, Alexander Korotkov <a.korotkov@postgrespro.ru>, Justin Pryzby <pryzby@telsasoft.com>, Alvaro Herrera <alvherre@2ndquadrant.com>, Masahiko Sawada <masahiko.sawada@2ndquadrant.com>, Tomas Vondra <tomas.vondra@2ndquadrant.com>, Amit Kapila <amit.kapila16@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, Darafei Komяpa Praliaskouski <me@komzpa.net>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Michael Banck <mbanck@gmx.net>
Date: 2020-03-28T21:30:40Z
Lists: pgsql-hackers 
On Sun, 29 Mar 2020 at 06:26, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> David Rowley <dgrowleyml@gmail.com> writes:
> > On Sat, 28 Mar 2020 at 17:12, Laurenz Albe <laurenz.albe@cybertec.at> wrote:
> >> In the light of that, I have no objections.
>
> > Thank you.  Pushed.
>
> It seems like this commit has resulted in some buildfarm instability:
>
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=lousyjack&dt=2020-03-28%2006%3A33%3A02
>
> apparent change of plan
>
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=petalura&dt=2020-03-28%2009%3A20%3A05
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=petalura&dt=2020-03-28%2013%3A20%3A05
>
> unstable results in stats_ext test

Yeah, thanks for pointing that out.  I'm just doing some tests locally
to see if I can recreate those results after vacuuming the mcv_list
table, so far I'm unable to.

Commits

  1. Further improve stability fix for partition_aggregate test.

  2. Improve stability fix for partition_aggregate test.

  3. Attempt to stabilize partitionwise_aggregate test

  4. Fix race condition in statext_store().

  5. Attempt to fix unstable regression tests, take 2

  6. Attempt to fix unstable regression tests

  7. Trigger autovacuum based on number of INSERTs

  8. Fix upper limit for vacuum_cleanup_index_scale_factor