From: Noah Misch <noah@leadboat.com>
To: Andres Freund <andres@anarazel.de>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Petr Jelinek <petr.jelinek@2ndquadrant.com>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: Erik Rijkers <er@xs4all.nl>
Cc: David Steele <david@pgmasters.net>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Craig Ringer <craig@2ndquadrant.com>
Cc: pgsql-hackers-owner@postgresql.org
Subject: Re: snapbuild woes
Date: Mon, 1 May 2017 20:55:23 -0700
Message-ID: <20170502035523.GA833767@rfd.leadboat.com> (raw)
In-Reply-To: <16845.1493656327@sss.pgh.pa.us>
References: <20170413045812.GA2917375@tornado.leadboat.com>
<20170417020404.GB2988768@tornado.leadboat.com>
<20170418041657.hvwss6hz73ghozp5@alap3.anarazel.de>
<20170420000906.75t6uo7bof5pazrq@alap3.anarazel.de>
<ad637c84-534d-b291-9b6c-458f1ff7f54b@2ndquadrant.com>
<20170422053458.z7kmzopqdyi2tai4@alap3.anarazel.de>
<20170429214201.GB799290@rfd.leadboat.com>
<4387.1493642807@sss.pgh.pa.us>
<20170501160918.j27fvngzuwspg7d6@alap3.anarazel.de>
<16845.1493656327@sss.pgh.pa.us>
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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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To: pgsql-hackers@postgresql.org
Cc: noah@leadboat.com, andres@anarazel.de, tgl@sss.pgh.pa.us, petr.jelinek@2ndquadrant.com, peter.eisentraut@2ndquadrant.com, er@xs4all.nl, david@pgmasters.net, robertmhaas@gmail.com, craig@2ndquadrant.com, pgsql-hackers-owner@postgresql.org
Subject: Re: snapbuild woes
In-Reply-To: <20170502035523.GA833767@rfd.leadboat.com>
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