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: Justin Pryzby <pryzby@telsasoft.com>, 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>, "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: 2021-09-21T01:48:11Z
Lists: pgsql-hackers 
On Fri, Sep 17, 2021 at 04:31:44PM +0000, Bossart, Nathan wrote:
> Done.

Thanks.  I have gone through the last patch this morning, did some
tests on all the platforms I have at hand (including Linux) and
finished by applying it after doing some small tweaks.  First, I have 
finished by extending GetHugePageSize() to accept NULL for its first
argument hugepagesize.  A second thing was in the docs, where it is
still useful IMO to keep the reference to /proc/meminfo and
/sys/kernel/mm/hugepages to let users know how the system impacts the
calculation of the new GUC.

Let's see what the buildfarm thinks about it.
--
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.