On Friday 04 June 2010 16:25:30 Tom Lane wrote: > Andres Freund <andres@xxxxxxxxxxx> 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 -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
