| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | yigongh(at)gmail(dot)com, pgsql-docs(at)lists(dot)postgresql(dot)org |
| Subject: | Re: The suggestion of reducing autovacuum_vacuum_cost_delay should be documented |
| Date: | 2020-05-12 21:40:14 |
| Message-ID: | 20200512214014.GD4666@momjian.us |
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| Lists: | pgsql-docs |
On Tue, May 12, 2020 at 10:26:27AM +0000, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/11/runtime-config-autovacuum.html
> Description:
>
> The `autovacuum_vacuum_cost_delay` setting changes to 2ms in PostgreSQL 12
> but in the old Postgresql version, the default setting is still 20ms. I
> would suggest adding a suggestion in the old document
> to lower the autovacuum_vacuum_cost_delay as:
>
> > The default value of autovacuum_vacuum_cost_delay is reduced to 2ms in
> PostgreSQL 12. Reducing the autovacuum_vacuum_cost_delay will make the
> autovacuum more aggressive and might reduce the vacuum cost for
> write-intensive workload on big table.
Uh, we usually don't suggest new defaults in back branches.
--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EnterpriseDB https://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
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