From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: Michael Paquier <michael.paquier@gmail.com>
Cc: PostgreSQL mailing lists <pgsql-hackers@postgresql.org>
Subject: Re: Reducing pg_ctl's reaction time
Date: Mon, 26 Jun 2017 16:39:50 -0400
Message-ID: <19384.1498509590@sss.pgh.pa.us> (raw)
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I wrote:
> Andres Freund <andres@anarazel.de> writes:
>> It'd not be unreasonble to check pg_control first, and only after that
>> indicates readyness check via the protocol.
> Hm, that's a thought. The problem here isn't the frequency of checks,
> but the log spam.
Actually, that wouldn't help much as things stand, because you can't
tell from pg_control whether hot standby is active. Assuming that
we want "pg_ctl start" to come back as soon as connections are allowed,
it'd have to start probing when it sees DB_IN_ARCHIVE_RECOVERY, which
means Jeff still has a problem with long recovery sessions.
We could maybe address that by changing the set of states in pg_control
(or perhaps simpler, adding a "hot standby active" flag there). That
might have wider consequences than we really want to deal with post-beta1
though.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, andres@anarazel.de, jeff.janes@gmail.com, michael.paquier@gmail.com
Subject: Re: Reducing pg_ctl's reaction time
In-Reply-To: <19384.1498509590@sss.pgh.pa.us>
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