Re: Missing pg_clog file / corrupt index / invalid page header

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: alex <an(at)clickware(dot)de>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: Missing pg_clog file / corrupt index / invalid page header
Date: 2007-09-05 07:02:11
Message-ID: 2394.1188975731@sss.pgh.pa.us
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alex <an(at)clickware(dot)de> writes:
> Summary
> ==========

> Various errors like:
> "invalid page header in block 8658 of relation",
> "could not open segment 2 of relation 1663/77142409/266753945 (target
> block 809775152)",
> "ERROR: could not access status of transaction 2134240 DETAIL: could
> not open file "pg_clog/0002": File not found",
> "CEST PANIC: right sibling's left-link doesn't match"

Ick. For any one of those errors, I would've thought it was Postgres'
fault, but when you have several it's not so clear. Kernel or hardware
flakiness have to be considered as alternative explanations.

> on the following system:
> Postgres 8.1.8
> SUsE Linux Kernel 2.6.13-15.8-smp

2.6.13 is not the latest, nor even close --- can you update the kernel
and see if things get better?

regards, tom lane

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