Date: Mon, 1 May 2017 20:55:23 -0700
From: Noah Misch <noah@leadboat.com>
To: Andres Freund <andres@anarazel.de>, Tom Lane <tgl@sss.pgh.pa.us>
Cc: Petr Jelinek <petr.jelinek@2ndquadrant.com>,
	Peter Eisentraut <peter.eisentraut@2ndquadrant.com>,
	Erik Rijkers <er@xs4all.nl>, David Steele <david@pgmasters.net>,
	PostgreSQL-development <pgsql-hackers@postgresql.org>,
	Robert Haas <robertmhaas@gmail.com>,
	Craig Ringer <craig@2ndquadrant.com>,
	pgsql-hackers-owner@postgresql.org
Subject: Re: snapbuild woes
Message-ID: <20170502035523.GA833767@rfd.leadboat.com>
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 <ad637c84-534d-b291-9b6c-458f1ff7f54b@2ndquadrant.com>
 <20170422053458.z7kmzopqdyi2tai4@alap3.anarazel.de>
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On Mon, May 01, 2017 at 12:32:07PM -0400, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
> > On 2017-05-01 08:46:47 -0400, Tom Lane wrote:
> >> 30sec is kind of a big lump from a buildfarm standpoint, especially if
> >> you mean "it runs for 30s on my honkin' fast workstation".  I'm fine
> >> with individual tests that run for ~ 1sec.
> 
> > I was more thinking of pgench -T$XX, rather than constant number of
> > iterations.  I currently can reproduce the issues within like 3-4
> > minutes, so 5s is probably not quite sufficient to get decent coverage.

You might hit the race faster by adding a dedicated stress test function to
regress.c.

> IMO the buildfarm is mainly for verifying portability, not for
> trying to prove that race-like conditions don't exist.

Perhaps so, but it has excelled at both tasks.


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