From: Justin Pryzby <pryzby@telsasoft.com>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Cc: pgsql-hackers@lists.postgresql.org
Subject: Re: What are exactly bootstrap processes, auxiliary processes, standalone backends, normal backends(user sessions)?
Date: Sat, 17 Jul 2021 09:58:57 -0500
Message-ID: <20210717145856.GB19498@telsasoft.com> (raw)
In-Reply-To: <202107171445.v4okkq2xyytm@alvherre.pgsql>
References: <CALj2ACUtWWWLKAU_R3pryw7JvF1kS+EnBZq1XYSVsJ7ehKkRCQ@mail.gmail.com>
<202107171445.v4okkq2xyytm@alvherre.pgsql>
On Sat, Jul 17, 2021 at 10:45:52AM -0400, Alvaro Herrera wrote:
> On 2021-Jul-17, Bharath Rupireddy wrote:
>
> > On Thu, Jul 15, 2021 at 8:17 PM Justin Pryzby <pryzby@telsasoft.com> wrote:
> > >
> > > On Fri, Jul 09, 2021 at 09:24:19PM +0530, Bharath Rupireddy wrote:
> > > > I've always had a hard time distinguishing various types of
> > > > processes/terms used in postgres. I look at the source code every time
> > > > to understand them, yet I don't feel satisfied with my understanding.
> > > > I request any hacker (having a better idea than me) to help me with
> > > > what each different process does and how they are different from each
> > > > other? Of course, I'm clear with normal backends (user sessions), bg
> > > > workers, but the others need a bit more understanding.
> > >
> > > It sounds like something that should be in the glossary, which currently refers
> > > to but doesn't define "auxiliary processes".
> >
> > Thanks. I strongly feel that it should be documented somewhere. I will
> > be happy if someone with a clear idea about these various processes
> > does it.
>
> Auxiliary process
>
> Process of an <glossterm linkend="glossary-instance">instance</glossterm> in
I think "of an instance" is a distraction here, even if technically accurate.
> charge of some specific, hardcoded background task. Examples are
And I think "hardcoded" doesn't mean anything beyond what "specific" means.
Maybe you'd say: .. process which handles a specific, central task for the
cluster instance.
Thanks,
--
Justin
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To: pgsql-hackers@postgresql.org
Cc: pryzby@telsasoft.com, alvherre@alvh.no-ip.org, bharath.rupireddyforpostgres@gmail.com, pgsql-hackers@lists.postgresql.org
Subject: Re: What are exactly bootstrap processes, auxiliary processes, standalone backends, normal backends(user sessions)?
In-Reply-To: <20210717145856.GB19498@telsasoft.com>
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