Date: Fri, 24 Jun 2016 18:59:30 -0400
From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: sean.hope@eroad.com
Cc: pgsql-bugs@postgresql.org
Subject: Re: BUG #14195: "MultiXactId XXXXXX has not been created yet
 -- apparent wraparound" after upgrade from 9.2
Message-ID: <20160624225930.GA356956@alvherre.pgsql>
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sean.hope@eroad.com wrote:

> Hi,
> 
> We're having issues with 'MultiXactId xxxxxxxxx has not been created yet --
> apparent wraparound' log messages upon table vacuums. The vacuums are
> cancelled by the system after this message is issued.
> 
> These messages have only been seen since upgrading from 9.2.x to 9.4.7 via
> pg_upgrade about a month ago. This is a large / high transaction rate (1120
> tps) database. We are unable to vacuum the affected tables (5 of them)
> currently due to this issue.

This is fixed now, finally.
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=61b24fef89a9f7e381e6d83029b63e062d32812b
The other thread I linked to earlier has more discussion.

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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