On 6/4/10 9:33 AM, Andres Freund wrote: > 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.. > > > First some details: Linux kernel 2.6.31 postgres version: 8.4.2 More test results: reiserfs: ~1 hour 50 minutes ext3 barrier=1: ~15 minutes ext4 nobarrier: ~15 minutes jfs: ~15 minutes -- Jon Schewe | http://mtu.net/~jpschewe If you see an attachment named signature.asc, this is my digital signature. See http://www.gnupg.org for more information. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
