| From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
|---|---|
| To: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> |
| Cc: | Scott Carey <scott(at)richrelevance(dot)com>, Jean-David Beyer <jeandavid8(at)verizon(dot)net>, "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Need help with 8.4 Performance Testing |
| Date: | 2008-12-09 17:26:12 |
| Message-ID: | 1228843572.13962.38.camel@jd-laptop.pragmaticzealot.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Tue, 2008-12-09 at 10:21 -0700, Scott Marlowe wrote:
> On Tue, Dec 9, 2008 at 9:37 AM, Scott Carey <scott(at)richrelevance(dot)com> wrote:
> Lucky you, having needs that are fulfilled by sequential reads. :)
>
> I wonder how many hard drives it would take to be CPU bound on random
> access patterns? About 40 to 60? And probably 15k / SAS drives to
> boot. Cause that's what we're looking at in the next few years where
> I work.
I was able to achieve only 10-20% IO/Wait even after beating the heck
out of the machine with 50 spindles (of course it does have 16 CPUs):
>
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