Re: Reducing pg_ctl's reaction time

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Reducing pg_ctl's reaction time
Date: 2017-06-28 17:31:27
Message-ID: 30238.1498671087@sss.pgh.pa.us
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Andres Freund <andres(at)anarazel(dot)de> writes:
> On 2017-06-27 14:59:18 -0400, Tom Lane wrote:
>> However, it's certainly arguable that this is too much change for an
>> optional post-beta patch.

> Yea, I think there's a valid case to be made for that. I'm still
> inclined to go along with this, it seems we're otherwise just adding
> complexity we're going to remove in a bit again.

I'm not hearing anyone speaking against doing this now, so I'm going
to go ahead with it.

> The 8-space thing in multiple places is a bit ugly. How about having a
> a bunch of constants declared in one place?

While looking this over again, I got worried about the fact that pg_ctl
is #including "miscadmin.h". That's a pretty low-level backend header
and it wouldn't be surprising at all if somebody tried to put stuff in
it that wouldn't compile frontend-side. I think we should take the
opportunity, as long as we're touching this stuff, to split the #defines
that describe the contents of postmaster.pid into a separate header file.
Maybe "utils/pidfile.h" ?

regards, tom lane

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