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Subject: Re: Another documentation issue
From: Daniel Gustafsson <daniel@yesql.se>
In-Reply-To: <03763b6b43cfd8a7194c2fb06452178db4256494.camel@cybertec.at>
Date: Wed, 23 Apr 2025 11:14:13 +0200
Cc: Igor Korot <ikorot01@gmail.com>,
 "pgsql-generallists.postgresql.org" <pgsql-general@lists.postgresql.org>
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 <03763b6b43cfd8a7194c2fb06452178db4256494.camel@cybertec.at>
To: Laurenz Albe <laurenz.albe@cybertec.at>
Archived-At: <https://www.postgresql.org/message-id/4B9E0CAC-FB06-4F35-8C77-33AEA7F741B7%40yesql.se>
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> On 23 Apr 2025, at 09:16, Laurenz Albe <laurenz.albe@cybertec.at> =
wrote:
> On Wed, 2025-04-23 at 00:21 -0500, Igor Korot wrote:

>> However, this page
>> =
https://www.postgresql.org/docs/current/runtime-config-resource.html#GUC-E=
FFECTIVE-IO-CONCURRENCY
>> describes both default and mn/max, however t s says:
>>=20
>> [quote]
>> The default is 1 on supported systems, otherwise 0
>> [/quote]]
>>=20
>> No explanation of what is "supported system" is given...
>>=20
>> And the same can be said about
>> =
https://www.postgresql.org/docs/current/runtime-config-resource.html#GUC-M=
AINTENANCE-IO-CONCURRENCY.
>=20
> According to the source, it is "systems that have posix_fadvise()".  =
We could document that,
> but I don't know if it would help many people.  I am not sure how easy =
and feasible it is
> to research which versions of which operating systems qualify.

=46rom memory it's supported on FreeBSD, NetBSD and Linux with Windows, =
macOS and
OpenBSD not supporting it.  Assuming I'm not completely wrong (a 1 =
minute
search shows it's in the ballpark) we could perhaps add something like
"Unsupported platforms include (but isn't limited to) Windows and macOS" =
which
would provide a bit more clarity.

--
Daniel Gustafsson