Re: Importance of CPU floating point performance...

> -----Original Message-----
> From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-
> owner@postgresql.org] On Behalf Of Nathan Wilhelmi
> Sent: Friday, November 09, 2007 12:01 PM
> To: pgsql-general@postgresql.org
> Subject: [GENERAL] Importance of CPU floating point performance...
>
> Hello - Trying to find out how much floating point operation
performance
> effects Postgres in general. Looking at some lower power machines that
> have good integer performance but not great floating point
performance,
> shared FPU across cpus. If we store, but don't use in query criteria,
> floating point numbers would Postgres perform the same as machine with
> dedicated FPUs per cpu? Anyone have any suggestions or horror stories
to
> share on this topic?

Like every database, CPU core count and cycle rate, disk speed and
memory size dominate the equation.

A fast 64 bit smp linux box with a ton of memory and the fastest
possible disk will give you top performance.

Here are some PG benchmarks:
http://tweakers.net/reviews/657/6
http://tweakers.net/reviews/657/5
http://www.spec.org/jAppServer2004/results/res2007q3/jAppServer2004-2007
0606-00065.html

Floating point performance will be nothing more than an afterthought for
most database performance situations.