Re: 7.3 vs 7.4 performance

On Fri, 2004-02-06 at 02:44, Hannu Krosing wrote:
> Christopher Browne kirjutas N, 05.02.2004 kell 07:32:
> > Oops! orion@trustcommerce.com (Orion Henry) was seen spray-painting on a wall:
> > > Oh... as a side note I'm happy to announce that the 2.6 Linux kernel
> > > has more than DOUBLED the speed of all my Postgres queries over the
> > > 2.4. =)
> >
> > I did some heavy-transaction-oriented tests recently on somewhat
> > heftier quad-Xeon hardware, and found little difference between 2.4
> > and 2.6, and a small-but-quite-repeatable advantage with FreeBSD 4.9.
> > Now, I'm quite sure my load was rather different from yours, but I
> > find the claim of doubling of speed rather surprising.
>
> perhaps you were just IO-bound while he was not ?
>
> or starving on some locks ?

The queries were across almost 4 gigs of data on a machine with 512 MB of ram.
I personally was assuming it was the anticipatory disk scheduler... but alas I
don't know why it affected me so much.