Re: 7.3 vs 7.4 performance

On Fri, 2004-02-06 at 02:43, Hannu Krosing wrote:
> Orion Henry kirjutas N, 05.02.2004 kell 07:16:
> > I've done some testing of 7.3.4 vs 7.4.1 and found 7.4.1 to be 20%-30%
> > slower than 7.3.4. Is this common knowledge or am I just unlucky with
> > my query/data selection?
> >
> > Things of note that might matter: the machine is a dual Opteron 1.4GHz
> > running Fedora Core 1 Test 1 for X86_64. The 7.3.4 was from the Fedora
> > distro and the 7.4.1 was the PGDG package.
>
> Are you sure that it is not the case that it is not tha case that 7.3.4
> is 64 bit and the PGDG package is 32 ?

Yes sure... I don't know if they were compiled with differing
optimizations or compilers though...

> > The database is 3.5 Gigs with 10 millions rows and the machine had 1 Gig or ram.
> >
> > 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. =)
>
> Is this on this same hardware ?

No. I havent gotten the 2.6 kernel working on the Opteron yet. The 2x speedup
was on a dual Athlon 2GHz.