On Thu, 2005-06-16 at 09:35, Francesco Dalla Ca' wrote:
> O.S.:
> SuSE SLES-8 (i386)
> VERSION = 8.1
>
> After some test with the "syncbench" posted on performance mailing-list
> (http://archives.postgresql.org/pgsql-performance/2004-09/msg00080.php)
> i have obtained that open() with O_DSYNC was the fastest sync method.
> I want to test this for parameter "wal_sync_method" on a test workload
> directly on Postgres and i have configured that on postgresql.conf file:
>
> wal_sync_method = open_datasync
>
> But at the server start:
>
> > pg_ctl -D /db10/postgres/data start
> postmaster starting
> > FATAL: invalid value for parameter "wal_sync_method": "open_datasync"
>
> What's wrong?
Not all methods are supported on all platforms. It appears this one
isn't supported on yours.
---------------------------(end of broadcast)---------------------------
TIP 8: explain analyze is your friend