From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
---|---|
To: | Stuart Bishop <stuart(at)stuartbishop(dot)net> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bruce Momjian <bruce(at)momjian(dot)us>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, PostgreSQL Bugs <pgsql-bugs(at)postgresql(dot)org> |
Subject: | Re: pg_upgrade < 9.3 -> >=9.3 misses a step around multixacts |
Date: | 2014-07-22 09:27:51 |
Message-ID: | 20140722092751.GF4629@alap3.anarazel.de |
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Thread: | |
Lists: | pgsql-bugs |
On 2014-07-22 16:08:37 +0700, Stuart Bishop wrote:
> On 21 July 2014 00:37, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> > I'm a bit inclined to not say anything about fix procedures in the release
> > notes, because I'm not sure that this is a problem in the field. If
> > anybody did have a wraparound they'd be getting bleats from VACUUM, and no
> > one has reported any such thing that I've heard.
>
> I hit the issue, but Andres helped on IRC (and so started this
> thread). Yes, VACUUM failing on a production server after the 9.1->9.3
> upgrade was the problem. I'd assumed there was database corruption and
> I had some unreadable blocks, and probably would have just rebuilt the
> table if #postgresql hadn't been so helpful.
This is actually a second problem that came up during the investigation
of the problem you had - with different symptoms and causes... IIRC it's
not what you've experienced.
If you look at
http://www.postgresql.org/docs/devel/static/release-9-3-5.html your
problem should be described.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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