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Re: Hyperthreading slows processes?

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 (view raw or flat)
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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