Horton

Re: First steps with 8.3 and autovacuum launcher

Simon Riggs <simon@2ndquadrant.com>

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From: Simon Riggs <simon@2ndquadrant.com>
To: Gregory Stark <stark@enterprisedb.com>
Cc: Alvaro Herrera <alvherre@commandprompt.com>, Guillaume Smet <guillaume.smet@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, "Matthew T. O'Connor" <matthew@zeut.net>, Heikki Linnakangas <heikki@enterprisedb.com>, Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2007-10-04T15:10:31Z
Lists: pgsql-hackers 
On Thu, 2007-10-04 at 16:07 +0100, Gregory Stark wrote:
> "Alvaro Herrera" <alvherre@commandprompt.com> writes:
> 
> > Hmm, it looks like the race condition Heikki mentioned is the culprit.
> > We need a way to stop future analyzes from starting.  Back to the
> > drawing board ...
> 
> A crazy idea I just had -- what if you roll this into the deadlock check? So
> after waiting on the lock for 1s it wakes up, finds that the holder it's
> waiting on is an autovacuum process and cancels it instead of finding no
> deadlock.

+1

-- 
  Simon Riggs
  2ndQuadrant  http://www.2ndQuadrant.com