Horton

Re: Pluggable cumulative statistics

Michael Paquier <michael@paquier.xyz>

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From: Michael Paquier <michael@paquier.xyz>
To: Andres Freund <andres@anarazel.de>
Cc: Postgres hackers <pgsql-hackers@lists.postgresql.org>
Date: 2024-07-04T23:28:33Z
Lists: pgsql-hackers 
On Thu, Jul 04, 2024 at 02:08:25PM -0700, Andres Freund wrote:
> I forgot to say: In general I am highly supportive of this effort and thankful
> to Michael for tackling it. The above was just about that one aspect.

Thanks.  Let's discuss how people want this stuff to be shaped, and
how much we want to cover.  Better to do it one small step at a time.
--
Michael

Commits

  1. injection_points: Add some fixed-numbered statistics

  2. injection_points: Add some cumulative stats for injection points

  3. Add helper routines to retrieve data for custom fixed-numbered pgstats

  4. Introduce pluggable APIs for Cumulative Statistics

  5. Switch PgStat_Kind from an enum to a uint32 type

  6. Improve comment of pgstat_read_statsfile()

  7. Add a new 'F' entry type for fixed-numbered stats in pgstats file

  8. Add PgStat_KindInfo.init_shmem_cb

  9. Use pgstat_kind_infos to write fixed shared statistics

  10. Replace hardcoded identifiers of pgstats file by #defines