pg.ddx.io pgsql-performance@postgresql.org mailing list archive
help / color / mirror / Atom feedHyperthreading slows processes?
2+ messages / 2 participants
[nested] [flat]
* Hyperthreading slows processes?
@ 2005-11-20 21:46 Craig A. James <cjames@modgraph-usa.com>
2005-11-21 01:24 ` Re: Hyperthreading slows processes? Dave Cramer <pg@fastcrypt.com>
0 siblings, 1 reply; 2+ messages in thread
From: Craig A. James @ 2005-11-20 21:46 UTC (permalink / raw)
To: ; +Cc: pgsql-performance
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
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Hyperthreading slows processes?
2005-11-20 21:46 Hyperthreading slows processes? Craig A. James <cjames@modgraph-usa.com>
@ 2005-11-21 01:24 ` Dave Cramer <pg@fastcrypt.com>
0 siblings, 0 replies; 2+ messages in thread
From: Dave Cramer @ 2005-11-21 01:24 UTC (permalink / raw)
To: Craig A. James <cjames@modgraph-usa.com>; +Cc: 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
>
> ---------------------------(end of
> broadcast)---------------------------
> TIP 4: Have you searched our list archives?
>
> http://archives.postgresql.org
>
^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2005-11-21 01:24 UTC | newest]
Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2005-11-20 21:46 Hyperthreading slows processes? Craig A. James <cjames@modgraph-usa.com>
2005-11-21 01:24 ` Dave Cramer <pg@fastcrypt.com>
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox