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Re: Testing pg_terminate_backend()

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Magnus Hagander <magnus(at)hagander(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org>
Subject: Re: Testing pg_terminate_backend()
Date: 2008-04-18 21:35:04
Message-ID: 200804182135.m3ILZ4W15909@momjian.us (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
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.

-- 
  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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