From: Andres Freund <andres@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: PostgreSQL Bugs <pgsql-bugs@postgresql.org>
Subject: Re: pg_upgrade < 9.3 -> >=9.3 misses a step around multixacts
Date: Mon, 21 Jul 2014 19:09:53 +0200
Message-ID: <20140721170953.GP5974@alap3.anarazel.de> (raw)
In-Reply-To: <6333.1405962201@sss.pgh.pa.us>
References: <19458.1405899435@sss.pgh.pa.us>
<20140720234925.GJ5974@alap3.anarazel.de>
<22178.1405903964@sss.pgh.pa.us>
<26504.1405912770@sss.pgh.pa.us>
<20140721161222.GA17049@alap3.anarazel.de>
<3655.1405959656@sss.pgh.pa.us>
<20140721163409.GB14989@alap3.anarazel.de>
<4182.1405961004@sss.pgh.pa.us>
<20140721164857.GO5974@alap3.anarazel.de>
<6333.1405962201@sss.pgh.pa.us>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-bugs>
On 2014-07-21 13:03:21 -0400, Tom Lane wrote:
> Andres Freund <andres@2ndquadrant.com> writes:
> > On 2014-07-21 12:43:24 -0400, Tom Lane wrote:
> >> Will fix.
>
> > I wonder if GetTopTransactionId()/MultiXactIdSetOldestMember() and using
> > lastSane* = ReadNew* isn't sufficient. After the xid assignment
> > concurrent GetOldest* can't go below the ReadNew* values anymore, right?
>
> I don't see any point in being picky about it. What we want is to reject
> values that are conclusively bogus; things that are just close to bogus
> are not so interesting.
It'd just have been about optimizing away repeated calls to ReadNew*...
Thanks.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
--
Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-bugs
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-bugs@postgresql.org
Cc: andres@2ndquadrant.com, tgl@sss.pgh.pa.us, bruce@momjian.us, alvherre@2ndquadrant.com
Subject: Re: pg_upgrade < 9.3 -> >=9.3 misses a step around multixacts
In-Reply-To: <20140721170953.GP5974@alap3.anarazel.de>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox