On Mon, 2005-08-08 at 17:03 -0400, Tom Lane wrote:
>
> That's a decision that hasn't got a shred of evidence to justify
> imposing it on every platform.
This option has its uses on Linux, however. In my testing it's good for
a large speedup (20%) on a 10-client pgbench, and a minor improvement
with 100 clients. See my mail of July 14th "O_DIRECT for WAL writes".
-jwb