Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0

From: Andres Freund <andres(at)anarazel(dot)de>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Stephen Frost <sfrost(at)snowman(dot)net>, Peter Geoghegan <pg(at)heroku(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0
Date: 2015-05-08 20:29:47
Message-ID: 20150508202947.GX12950@alap3.anarazel.de
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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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