Horton

Re: Estimating HugePages Requirements?

Michael Paquier <michael@paquier.xyz>

View thread View on postgr.es
From: Michael Paquier <michael@paquier.xyz>
To: "Bossart, Nathan" <bossartn@amazon.com>
Cc: Kyotaro Horiguchi <horikyota.ntt@gmail.com>, "tgl@sss.pgh.pa.us" <tgl@sss.pgh.pa.us>, "robertmhaas@gmail.com" <robertmhaas@gmail.com>, "masao.fujii@oss.nttdata.com" <masao.fujii@oss.nttdata.com>, "pryzby@telsasoft.com" <pryzby@telsasoft.com>, "andres@anarazel.de" <andres@anarazel.de>, "magnus@hagander.net" <magnus@hagander.net>, "mark.dilger@enterprisedb.com" <mark.dilger@enterprisedb.com>, "don@seiler.us" <don@seiler.us>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2021-09-16T02:41:55Z
Lists: pgsql-hackers 
On Wed, Sep 15, 2021 at 10:31:20PM +0000, Bossart, Nathan wrote:
> +        This can be used on a running server for most parameters.  However,
> +        the server must be shut down for some runtime-computed parameters
> +        (e.g., <xref linkend="guc-shared-memory-size"/>, and
> +        <xref linkend="guc-wal-segment-size"/>).
> 
> nitpick: I think you can remove the comma before the "and" in the list
> of examples.

Fixed that, and applied.  Could you rebase the last patch with the
name suggested for the last GUC, including the docs?  It looks like we
are heading for shared_memory_size_in_huge_pages.
--
Michael

Commits

  1. Silence extra logging when using "postgres -C" on runtime-computed GUCs

  2. doc: Improve postgres command for shared_memory_size_in_huge_pages

  3. Introduce GUC shared_memory_size_in_huge_pages

  4. Support "postgres -C" with runtime-computed GUCs

  5. Make shared_memory_size a preset option

  6. Introduce GUC shared_memory_size

  7. Move the shared memory size calculation to its own function

  8. Add new GUC, max_worker_processes, limiting number of bgworkers.