Re: How filesystems matter with PostgreSQL

Andres Freund  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.

			regards, tom lane