Horton

Re: Storing hot members of PGPROC out of the band

Bruce Momjian <bruce@momjian.us>

View thread
From: Bruce Momjian <bruce@momjian.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, Simon Riggs <simon@2ndquadrant.com>, Pavan Deolasee <pavan.deolasee@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2011-12-17T01:25:51Z
Lists: pgsql-hackers 
Robert Haas wrote:
> On that theory, I'm inclined to think that's not really a problem.
> We'll go nuts if we refuse to commit anything until it shows a
> meaningful win on every imaginable workload, and it seems like this
> can't really be worse than the status quo; any case where it is must
> be some kind of artifact.  We're better of getting rid of as much
> ProcArrayLock contention as possible, rather than keeping it around
> because there are corner cases where it decreases contention on some
> other lock.

Interesting conclusion, and it makes sense.  Seems once this is applied
we will have more places to look for contention improvements.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +