Re: Testing pg_terminate_backend()

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Magnus Hagander <magnus(at)hagander(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>
Cc: PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org>
Subject: Re: Testing pg_terminate_backend()
Date: 2008-04-18 22:37:49
Message-ID: 200804182237.m3IMbn622329@momjian.us
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bruce wrote:
> Magnus Hagander wrote:
> > Tom Lane wrote:
> > > Bruce Momjian <bruce(at)momjian(dot)us> writes:
> > > > Attached is my test script. I ran it for 14 hours (asserts on),
> > > > running 450 regression tests, with up to seven backends killed per
> > > > regression test.
> > >
> > > Hmm, there are something on the order of 10000 SQL commands in our
> > > regression tests, so even assuming perfect randomness you've exercised
> > > SIGTERM on maybe 10% of them --- and of course there's multiple places
> > > in a complex DDL command where SIGTERM might conceivably be a problem.
> > >
> > > Who was volunteering to run this 24x7 for awhile?
> >
> > That was me. As long as the script runs properly on linux, I can get
> > that started as soon as I'm fed instructions on how to do it :-) Do I
> > just fix the paths and set it running, or do I need to prepare
> > something else?
>
> Nothing special to prepare. Compile with asserts enabled, and run the
> script. The comment at the top explains how to analyze the log for
> interesting error messages.

Oh, you need to set a variable in the script indicating the average
number of seconds it takes to run the regression test on your system.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +

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