Re: Re: Faster CREATE DATABASE by delaying fsync (was 8.4.1 ubuntu karmic slow createdb) - Mailing list pgsql-hackers

From Andres Freund
Subject Re: Re: Faster CREATE DATABASE by delaying fsync (was 8.4.1 ubuntu karmic slow createdb)
Date
Msg-id 200912290129.35267.andres@anarazel.de
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In response to Re: Faster CREATE DATABASE by delaying fsync (was 8.4.1 ubuntu karmic slow createdb)  (Greg Stark <gsstark@mit.edu>)
List pgsql-hackers
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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