From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Geoghegan <pg@bowt.ie>
cc: Andres Freund <andres@anarazel.de>,
        PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: buildfarm: could not read block 3 in file "base/16384/2662": read
 only 0 of 8192 bytes
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Comments: In-reply-to Peter Geoghegan <pg@bowt.ie>
	message dated "Wed, 08 Aug 2018 21:55:23 -0700"
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Date: Fri, 10 Aug 2018 22:45:30 -0400
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Peter Geoghegan <pg@bowt.ie> writes:
> On Wed, Aug 8, 2018 at 7:40 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Oooh ... but pg_class wouldn't be big enough to get a parallel
>> index rebuild during that test, would it?

> Typically not, but I don't think that we can rule it out right away.

Didn't take long to show that the relmapper issue wasn't it:

https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=3Dcoypu&dt=3D2018-=
08-10%2021%3A21%3A40

So we're back to square one.  Although Tomas' recent report might
give us something new to chase.

			regards, tom lane