From: Tom Lane <tgl@sss.pgh.pa.us>
To: Evan Walter <ewalter@decisionanalyst.com>
cc: pgsql-admin@postgresql.org
Subject: Re: getting a error message when creating temporary table
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Comments: In-reply-to Evan Walter <ewalter@decisionanalyst.com>
 message dated "Mon, 28 Apr 2014 15:39:30 -0500"
Date: Mon, 28 Apr 2014 18:48:29 -0400
Message-ID: <29685.1398725309@sss.pgh.pa.us>
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Sender: pgsql-admin-owner@postgresql.org

Evan Walter <ewalter@decisionanalyst.com> writes:
>  Not sure what is causing this.  When we execute:
> CREATE TEMPORARY TABLE test(test_code varchar (255))

> We get

> ERROR: could not read block 6 in file "global/... "  read only 0 of 8192
> bytes

What's the exact filename you omitted there, and which PG version is this?

I'm guessing this indicates corruption of pg_shdepend or one of its
indexes, as that seems like the only shared catalog that's really likely
to get touched during a CREATE TEMP TABLE.  If you're lucky, it's one of
the indexes, and a REINDEX will fix it.

Have you had any OS-level crashes lately, power failures, etc?  Whatever
is corrupted exactly, this shouldn't have happened if filesystem integrity
was being maintained properly.

			regards, tom lane


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