MIME-Version: 1.0
References: 
 <CA+hUKGJLe-0E-wZ-is78CEHhjbC=ihMVCQLoN1dmD-j05s9qRg@mail.gmail.com>
 <pdrbpbvhscwckb6nqkfgoo7o63nnmeq7taaazgfi3bk627gb6p@rzcauoqabb3k>
 <CA+hUKG+P80oR7yy5-67uHqwBWr9rux69BkQF9fwz=f0LuDn3Rw@mail.gmail.com>
 <CA+hUKGKgVhLVS4Pne8cTR0f=tE8GtF4-CvY2HMDOJEm7w0iXfA@mail.gmail.com>
 <20260328095204.5tsq5bldugeumrtf@erthalion>
 <CA+hUKGLUZ51zkxUoBvANcLdvz8DjS_85=6985HE8gLuNtBxX7Q@mail.gmail.com>
 <jp7lhn2wng5mlhn3jvn4t6nmr23l6bnim5af3qslnoguevfqqz@d7cvksm62j4j>
 <CA+hUKGLp_yPztSoQkmRe1kFk1M5JNr7b+07cc+46AVg=VoKC-Q@mail.gmail.com>
 <adaz4sd2x64uoei2nmd4pinvothusd7uwllnilq6msfp4wytrw@npedbcvg3llt>
 <CA+hUKGJi6L2ftuTiKw2W4AAah6Uivs4JGiq58A7MjePbXpc4BA@mail.gmail.com>
 <4vhrgxmx5w4cjr7vgegur3hbkuojt2iz23v4dqfypsgvl5bszi@xrxefkkcxdja>
 <CA+hUKGK=vELXFXNj2L=vTkof6s_EQzTjYXXrUVwOOW0rahEfVg@mail.gmail.com>
In-Reply-To: 
 <CA+hUKGK=vELXFXNj2L=vTkof6s_EQzTjYXXrUVwOOW0rahEfVg@mail.gmail.com>
From: Thomas Munro <thomas.munro@gmail.com>
Date: Wed, 8 Apr 2026 14:24:57 +1200
Message-ID: 
 <CA+hUKG+WZfFjwE-nDpKbzq=M37GntjcqvKdzV+dLkDgXEWppdg@mail.gmail.com>
Subject: Re: Automatically sizing the IO worker pool
To: Andres Freund <andres@anarazel.de>
Cc: Dmitry Dolgov <9erthalion6@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Archived-At: 
 <https://www.postgresql.org/message-id/CA%2BhUKG%2BWZfFjwE-nDpKbzq%3DM37GntjcqvKdzV%2BdLkDgXEWppdg%40mail.gmail.com>
Precedence: bulk

On Wed, Apr 8, 2026 at 2:09=E2=80=AFPM Thomas Munro <thomas.munro@gmail.com=
> wrote:
> > Seems like there should be two fields. One saying "notify postmaster ag=
ain"
> > and one "postmaster start a worker".  The former would only be cleared =
by
> > postmaster after the timeout.
>
> Good idea.  V7 has two tweaks:
>
> * separate grow and grow_signal_sent flags, as you suggested
> * it also applies the io_worker_launch_delay to cancelled grow requests

Oh, but that logic should of course be moved below the "time in the
past" check.  Will do...