Horton

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

Alvaro Herrera <alvherre@alvh.no-ip.org>

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From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: Dilip Kumar <dilipbalaut@gmail.com>
Cc: tender wang <tndrwang@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2024-02-01T10:14:00Z
Lists: pgsql-hackers 
On 2024-Feb-01, Dilip Kumar wrote:

> On Thu, Feb 1, 2024 at 3:19 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> >
> > postgres -c lc_messages=C -c shared_buffers=$((512*17))
> >
> > 2024-02-01 10:48:13.548 CET [1535379] FATAL:  invalid value for parameter "transaction_buffers": 17
> > 2024-02-01 10:48:13.548 CET [1535379] DETAIL:  "transaction_buffers" must be a multiple of 16
> 
> Maybe we should resize it to the next multiple of the SLRU_BANK_SIZE
> instead of giving an error?

Since this is the auto-tuning feature, I think it should use the
previous multiple rather than the next, but yeah, something like that.


While I have your attention -- if you could give a look to the 0001
patch I posted, I would appreciate it.

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/
"Los trabajadores menos efectivos son sistematicamente llevados al lugar
donde pueden hacer el menor daño posible: gerencia."  (El principio Dilbert)

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.