Michael Guerin <[EMAIL PROTECTED]> writes:
> Also, all files in pg_clog are sequential with the last file being 0135.

Hmm, that makes it sound like a plain old data-corruption problem, ie,
trashed xmin or xmax in some tuple header.  Can you do a "select
count(*)" from this table without getting the error?

>> PostgreSQL 8.1RC1 on x86_64-unknown-linux-gnu, compiled by GCC gcc 
>> (GCC) 4.0.1

[ raised eyebrow... ]  You're keeping important data in an RC version
that you've not updated for more than a year?  Your faith in Postgres'
code quality is touching, but I'd counsel getting onto a more recent
release.

                        regards, tom lane

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