Horton

Re: problems with "Shared Memory and Semaphores" section of docs

Sami Imseih <simseih@amazon.com>

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From: "Imseih (AWS), Sami" <simseih@amazon.com>
To: Andres Freund <andres@anarazel.de>
Cc: Nathan Bossart <nathandbossart@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Justin Pryzby <pryzby@telsasoft.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2024-05-17T19:34:06Z
Lists: pgsql-hackers 
> postgres -D pgdev-dev -c shared_buffers=16MB -C shared_memory_size_in_huge_pages
> 13
> postgres -D pgdev-dev -c shared_buffers=16MB -c huge_page_size=1GB -C shared_memory_size_in_huge_pages
> 1


> Which is very useful to be able to actually configure that number of huge
> pages. I don't think a system view or such would not help here.

Oops. Totally missed the -C flag. Thanks for clarifying!

Regards,

Sami

Commits

  1. Introduce num_os_semaphores GUC.

  2. Fix documentation for POSIX semaphores.

  3. Fix documentation for System V semaphores.