From: Andres Freund <andres@anarazel.de>
To: pgsql-hackers@postgresql.org
Cc: Greg Stark <gsstark@mit.edu>
Cc: pgsql-performance@postgresql.org, Michael Clemmons <glassresistor@gmail.com>
Cc: Hannu Krosing <hannu@2ndquadrant.com>
Cc: Scott Marlowe <scott.marlowe@gmail.com>
Subject: Re: [HACKERS] Re: Faster CREATE DATABASE by delaying fsync (was 8.4.1 ubuntu karmic slow createdb)
Date: Tue, 29 Dec 2009 01:29:34 +0100
Message-ID: <200912290129.35267.andres@anarazel.de> (raw)
In-Reply-To: <407d949e0912281627q2b857c8cn672e3a9b2cb083a0@mail.gmail.com>
References: <4427a97a0912101235x3ade510blcc00d5ce9883c6b6@mail.gmail.com>
<200912282354.51892.andres@anarazel.de>
<407d949e0912281627q2b857c8cn672e3a9b2cb083a0@mail.gmail.com>
On Tuesday 29 December 2009 01:27:29 Greg Stark wrote:
> On Mon, Dec 28, 2009 at 10:54 PM, Andres Freund <andres@anarazel.de> wrote:
> > fsync everything in that pass.
> > Including the directory - which was not done before and actually might be
> > necessary in some cases.
>
> Er. Yes. At least on ext4 this is pretty important. I wish it weren't,
> but it doesn't look like we're going to convince the ext4 developers
> they're crazy any day soon and it would really suck for a database
> created from a template to have files in it go missin.
Actually it was necessary on ext3 as well - the window to hit the problem just
was much smaller, wasnt it?
Actually that part should possibly get backported.
Andres
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To: pgsql-hackers@postgresql.org
Cc: andres@anarazel.de, gsstark@mit.edu, glassresistor@gmail.com, hannu@2ndquadrant.com, scott.marlowe@gmail.com
Subject: Re: [HACKERS] Re: Faster CREATE DATABASE by delaying fsync (was 8.4.1 ubuntu karmic slow createdb)
In-Reply-To: <200912290129.35267.andres@anarazel.de>
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