Re: [HACKERS] Re: Faster CREATE DATABASE by delaying fsync (was 8.4.1 ubuntu karmic slow createdb)

Andres Freund <andres@anarazel.de>

From: Andres Freund <andres@anarazel.de>

To: pgsql-hackers@postgresql.org

Cc: Robert Haas <robertmhaas@gmail.com>, Alvaro Herrera <alvherre@commandprompt.com>, Tom Lane <tgl@sss.pgh.pa.us>, Greg Smith <greg@2ndquadrant.com>, Greg Stark <gsstark@mit.edu>, pgsql-performance@postgresql.org, Michael Clemmons <glassresistor@gmail.com>, Hannu Krosing <hannu@2ndquadrant.com>, Scott Marlowe <scott.marlowe@gmail.com>

Date: 2010-02-11T02:27:30Z

Lists: pgsql-hackers, pgsql-performance

Attachments

directory-fsync-8.1-to-8.4.patch (text/x-patch) patch

On Monday 08 February 2010 05:53:23 Robert Haas wrote:
> On Sun, Feb 7, 2010 at 10:09 PM, Alvaro Herrera
> 
> <alvherre@commandprompt.com> wrote:
> > Andres Freund escribió:
> >> I personally think the fsync on the directory should be added to the
> >> stable branches - other opinions?
> >> If wanted I can prepare patches for that.
> > 
> > Yeah, it seems there are two patches here -- one is the addition of
> > fsync_fname() and the other is the fsync_prepare stuff.
> 
> Andres, you want to take a crack at splitting this up?
I hope I didnt duplicate Gregs work, but I didnt hear back from him, so...

Everything <8.1 is hopeless because cp is used there... I didnt see it worth 
to replace that. The patch applies cleanly for 8.1 to 8.4 and survives the 
regression tests

Given pg's heavy commit model I didnt see a point to split the patch for 9.0 
as well...

Andres