Horton

Re: SLRU optimization - configurable buffer pool and partitioning the SLRU lock

x4mmm@yandex-team.ru

View thread View on postgr.es
From: "Andrey M. Borodin" <x4mmm@yandex-team.ru>
To: Dilip Kumar <dilipbalaut@gmail.com>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2023-11-20T09:07:18Z
Lists: pgsql-hackers 

> On 20 Nov 2023, at 13:51, Dilip Kumar <dilipbalaut@gmail.com> wrote:
> 
> 2) Do we really need one separate lwlock tranche for each SLRU?
> 
> IMHO if we use the same lwlock tranche then the wait event will show
> the same wait event name, right? And that would be confusing for the
> user, whether we are waiting for Subtransaction or Multixact or
> anything else.  Is my understanding no correct here?

If we give to a user multiple GUCs to tweak, I think we should give a way to understand which GUC to tweak when they observe wait times.

Best regards, Andrey Borodin.

Commits

  1. Fix zeroing of pg_serial page without SLRU bank lock

  2. Fix misspelled assertions

  3. GUC table: Add description to computed variables

  4. Improve performance of subsystems on top of SLRU

  5. Rename SLRU elements in view pg_stat_slru

  6. Use atomic access for SlruShared->latest_page_number

  7. Split use of SerialSLRULock, creating SerialControlLock

  8. Index SLRUs by 64-bit integers rather than by 32-bit integers

  9. Add a macro templatized hashtable.