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Re: Unexpected chunk number

From: Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>
To: Chris Purcell <chris(dot)purcell(dot)39(at)gmail(dot)com>
Cc: pgsql-bugs(at)postgresql(dot)org, Sunir Shah <sunir(at)sunir(dot)org>
Subject: Re: Unexpected chunk number
Date: 2006-09-12 10:48:44
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-bugs
Chris Purcell wrote:
> Hi,
> On running pg_dump, I am consistently getting the following errors:
> pg_dump: ERROR:  unexpected chunk number 2 (expected 0) for toast value 
> 223327
> pg_dump: SQL command to dump the contents of table "pagecache" failed: 
> PQendcopy() failed.
> pg_dump: Error message from server: ERROR:  unexpected chunk number 2 
> (expected 0) for toast value 223327
> pg_dump: The command was: COPY meatballwiki.pagecache (page, 
> lastmodified, response) TO stdout;
> I am running psql 8.1.4. The disk storing the database was recently 
> corrupted, and we restored from an old image; I appreciate this is 
> likely to have triggered the error. What I'm interested in is how to fix 
> it!

"old image" - does that refer to something like an filesystem level 
backup or the restoration of a former pg_dump generated backup ?
The former is generally NOT save (except if you followed the 
PITR-advises in the docs or similiar) with a running postmaster ...


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