Re: How filesystems matter with PostgreSQL

UFS2 w/ soft updates on FreeBSD might be an interesting addition to the list
of test cases

On Fri, Jun 4, 2010 at 9:33 AM, Andres Freund <andres(at)anarazel(dot)de> wrote:

> On Friday 04 June 2010 16:25:30 Tom Lane wrote:
> > Andres Freund <andres(at)anarazel(dot)de> writes:
> > > On Friday 04 June 2010 14:17:35 Jon Schewe wrote:
> > >> XFS (logbufs=8): ~4 hours to finish
> > >> ext4: ~1 hour 50 minutes to finish
> > >> ext3: 15 minutes to finish
> > >> ext3 on LVM: 15 minutes to finish
> > >
> > > My guess is that some of the difference comes from barrier differences.
> > > ext4 uses barriers by default, ext3 does not.
> > Or, to put it more clearly: the reason ext3 is fast is that it's unsafe.
> Jon: To verify you can enable it via the barrier=1 option during mounting..
>
> Andres
>
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