Tom:

Thanks. What's odd here is that we seemed to have none of them, and then
found a bunch, immediately after processes starting crashing.

This is not the first time this has happened -- we had an outbreak once
before.

It's quite possible that we had these lurking in there for a while, and only
found them during the checks we did after the process crashes.

Does 7.4.6 incorporate the patch for this?

-- sgl


> From: Tom Lane <[EMAIL PROTECTED]>
> Date: Wed, 09 Feb 2005 23:50:47 -0500
> To: Steve Lane <[EMAIL PROTECTED]>
> Cc: "Joshua D. Drake" <[EMAIL PROTECTED]>, <pgsql-admin@postgresql.org>,
> Jesse LaVere <[EMAIL PROTECTED]>
> Subject: Re: [ADMIN] PG 7.4: duplicate rows in violation of unique
> 
> Steve Lane <[EMAIL PROTECTED]> writes:
>> Sorry -- 7.4.5
> 
> I'm wondering if this could be related to this post-7.4.5 fix:
> 
> 2004-10-13 18:22  tgl
> 
> * contrib/pgstattuple/pgstattuple.c,
> src/backend/access/heap/heapam.c,
> src/backend/utils/adt/ri_triggers.c (REL7_4_STABLE): Repair
> possible failure to update hint bits back to disk, per
> http://archives.postgresql.org/pgsql-hackers/2004-10/msg00464.php.
> 
> What you are describing sure sounds like a foulup in commit status
> marking for multiple versions of a row.  I'm not convinced it would be
> fixed by the abovementioned patch, but it sounds close.
> 
> regards, tom lane


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