Re: BGWriter latch, power saving
Simon Riggs <simon@2ndquadrant.com>
From: Simon Riggs <simon@2ndQuadrant.com>
To: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
Cc: Peter Geoghegan <peter@2ndquadrant.com>, PG Hackers <pgsql-hackers@postgresql.org>
Date: 2012-01-04T08:11:19Z
Lists: pgsql-hackers
On Wed, Jan 4, 2012 at 7:24 AM, Heikki Linnakangas <heikki.linnakangas@enterprisedb.com> wrote: > Setting a latch that's already set is fast, > but surely it's even faster to not even try. Agreed. I think we should SetLatch() at the first point a backend writes a dirty buffer because the bgwriter has been inactive. Continually waking the bgwriter makes it harder for it to return to sleep. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services