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Re: Upgrading rant.

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: Oliver Elphick <olly(at)lfix(dot)co(dot)uk>, Hannu Krosing <hannu(at)tm(dot)ee>,mlw <pgsql(at)mohawksoft(dot)com>, Lamar Owen <lamar(dot)owen(at)wgcr(dot)org>,pgsql-hackers(at)postgresql(dot)org
Subject: Re: Upgrading rant.
Date: 2003-01-05 04:37:59
Message-ID: 6281.1041741479@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Tom Lane wrote:
>> That's a good kluge, but still a kluge: it doesn't completely guarantee
>> that no one else connects while pg_upgrade is trying to do its thing.

> I was thinking about using GUC:

> 	#max_connections = 32
> 	#superuser_reserved_connections = 2

> Set both of those to 1, and you lock out everyone but the super-user. 

You're missing the point: I don't want to lock out everyone but the
super-user, I want to lock out everyone, period.  Superusers are just
as likely to screw up pg_upgrade as anyone else.

BTW:

$ postmaster -N 1 -c superuser_reserved_connections=1
postmaster: superuser_reserved_connections must be less than max_connections.
$

			regards, tom lane

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