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Re: could not truncate directory "pg_subtrans": apparent wraparound

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Mikko Partio <mpartio(at)gmail(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: could not truncate directory "pg_subtrans": apparent wraparound
Date: 2010-05-23 18:02:40
Message-ID: 18038.1274637760@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-admin
Mikko Partio <mpartio(at)gmail(dot)com> writes:
> got the following line at postgresql log:

> May 16 01:17:35 xxx postgres[25550]: [1-1] LOG:  could not truncate
> directory "pg_subtrans": apparent wraparound

>  PostgreSQL 9.0beta1 on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC)
> 4.1.2 20080704 (Red Hat 4.1.2-46), 64-bit

Where did this beta1 installation come from --- was it freshly initdb'd
under 9.0, or did you use pg_upgrade on a pre-existing database that had
been around for awhile?  It strikes me that the recently identified bug
in pg_upgrade about not fixing the datfrozenxid of template0 might
possibly explain this.  You'd need to have upgraded an installation that
was at least a couple billion transactions old to hit that bug.

			regards, tom lane

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