Re: pg_dumpall failing from possible corrupted shared memory

From: Richard Broersma Jr <rabroersma(at)yahoo(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: General PostgreSQL List <pgsql-general(at)postgresql(dot)org>
Subject: Re: pg_dumpall failing from possible corrupted shared memory
Date: 2006-10-27 21:28:08
Message-ID: 728090.94812.qm@web31813.mail.mud.yahoo.com
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> Richard Broersma Jr <rabroersma(at)yahoo(dot)com> writes:
> >> Are you interested in dumping out the page of pg_index that
> >> contains this record, using pg_filedump?
>
> > I've attached the results.log to the email.
>
> Well, there's our smoking gun:
> 1bfc: 74746e6f 00000000 00000000 1c000000 ttno............
> ^^^^^^^^^^^^^^^^^^^^^^^^^^
> 1c0c: 01000000 00000000 1a000000 6d6f6420 ............mod
> ^^^^^^^^^^^^^^^^^^^^^^^^^^

> The underlined stuff has overwritten what should be expression dump
> text.
>
> Seeing that the corruption begins at page offset 1c00 --- that is,
> exactly on a 1K boundary --- I'm a bit inclined to suspect a disk
> I/O glitch. You might want to run some hardware diagnostics on
> your machine.

Thanks Tom for helping me through this mental exercise. Yes, I would agree my server hardware is
suspect and should be replaced concidering with the above evidence.

Regards,

Richard Broersma Jr.

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