| From: | "Gavin M(dot) Roy" <gmr(at)ehpg(dot)net> |
|---|---|
| To: | "Gregory Stark" <stark(at)enterprisedb(dot)com> |
| Cc: | "Guillaume Smet" <guillaume(dot)smet(at)gmail(dot)com>, "Simon Riggs" <simon(at)2ndquadrant(dot)com>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>, "Greg Smith" <gsmith(at)gregsmith(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: 8.3devel slower than 8.2 under read-only load |
| Date: | 2007-11-24 23:36:27 |
| Message-ID: | af1bce590711241536s24d3b067u478877039391e075@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 11/24/07, Gregory Stark <stark(at)enterprisedb(dot)com> wrote:
>
> This is a conflict which will affect Postgres in the future as well.
> Generally
> I/O costs win over cpu costs in databases since only relatively small
> systems
> are cpu-bound. Large systems are typically I/O-bound.
>
That really depends on hardware doesn't it? I'd say that I'm more concerned
with CPU than IO on high-end hardware as a generalization, especially with
the scaling issues beyond 32 CPU's.
Regards,
Gavin
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