The Friday 04 June 2010 15:59:05, Tom Lane wrote : > Marc Cousin <cousinmarc@xxxxxxxxx> writes: > > I hope I'm not going to expose an already known problem, but I couldn't > > find it mailing list archives (I only found > > http://archives.postgresql.org/pgsql- hackers/2009-12/msg01543.php). > > You sure this isn't the well-known "ext4 actually implements fsync > where ext3 didn't" issue? > > regards, tom lane Everything is ext4. So I should have fsync working with write barriers on all the tests. I don't think this problem is of the same kind: I think it is really because of O_DSYNC appearing on 2.6.33, and PostgreSQL using it by default now. If my filesystem was lying to me about barriers, I should take no more performance hit with open_datasync than with fdatasync, should I ? -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
