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From: Andres Freund <andres@anarazel.de>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Stephen Frost <sfrost@snowman.net>
Cc: Peter Geoghegan <pg@heroku.com>
Cc: Heikki Linnakangas <hlinnaka@iki.fi>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: Dean Rasheed <dean.a.rasheed@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Subject: Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0
Date: Fri, 8 May 2015 23:13:39 +0200
Message-ID: <20150508211339.GY12950@alap3.anarazel.de> (raw)
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On 2015-05-08 22:29:47 +0200, Andres Freund wrote:
> On 2015-05-08 15:22:09 -0400, Tom Lane wrote:
> > I'm back to suspecting that the indcheckxmin issue is the true cause of
> > the buildfarm failure

> > though we lack an explanation why Andres failed to reproduce it ...
> 
> My laptop is probably a good bit faster than jaguarundi, particularly in
> a single "threaded" workload, as that test, due to turbo
> boost. Friarbird didn't trigger it either so far.  It's quite possible
> that it requires a concurrent analyze or so to run to occur in the wrong
> moment.

prairiedog, without CCA, failed as well
http://pgbuildfarm.org/cgi-bin/show_log.pl?nm=prairiedog&dt=2015-05-08%2019%3A55%3A11
different test, but again directly after index creation. So I hope it's
indeed the indcheckxmin thing.

Andres


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