| From: | Dave Cramer <pg(at)fastcrypt(dot)com> |
|---|---|
| To: | Craig A(dot) James <cjames(at)modgraph-usa(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Hyperthreading slows processes? |
| Date: | 2005-11-21 01:24:24 |
| Message-ID: | C875A76F-AC09-4207-97D6-DE7969244146@fastcrypt.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
Yeah, it's pretty much a known issue for postgres
Dave
On 20-Nov-05, at 4:46 PM, Craig A. James wrote:
> This article on ZDNet claims that hyperthreading can *hurt*
> performance, due to contention in the L1/L2 cache by a second process:
>
> http://news.zdnet.co.uk/0,39020330,39237341,00.htm
>
> Has anyone tested this on Postgres yet? (And based on a recent
> somewhat caustic thread about performance on this forum, I'm going
> to avoid speculation, and let those who actually *know* answer! ;-)
>
> Craig
>
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