Horton

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

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: Laurenz Albe <laurenz.albe@cybertec.at>
Cc: Alexander Korotkov <a.korotkov@postgrespro.ru>, Justin Pryzby <pryzby@telsasoft.com>, Alvaro Herrera <alvherre@2ndquadrant.com>, Masahiko Sawada <masahiko.sawada@2ndquadrant.com>, David Rowley <dgrowleyml@gmail.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: 2020-03-26T18:50:56Z
Lists: pgsql-hackers 
Hi,

On 2020-03-26 10:12:39 +0100, Laurenz Albe wrote:
> On Wed, 2020-03-25 at 23:19 +0300, Alexander Korotkov wrote:
> I am reluctant to introduce new semantics like a reloption value of -2
> to disable a feature in this patch right before feature freeze.
> 
> I believe there are enough options to disable insert-only vacuuming for
> an individual table:

> - Set the threshold to 2147483647.  True, that will not work for very
>   large tables, but I think that there are few tables that insert that
>   many rows before they hit autovacuum_freeze_max_age anyway.
> 
> - Set the scale factor to some astronomical value.

Meh. You *are* adding new semantics with these. And they're terrible.

Greetings,

Andres Freund

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