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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 22:29:47 +0200
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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

Me too.

> 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.

I've pushed the fixes to those two. I guess we'll have to wait a couple
(slow) buildfarm cycles to see whether it fixes things.

Greetings,

Andres Freund


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