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Re: hyperthreading or not

On Tuesday 24 January 2006 00:44, michael wrote:
> Hello,
> I've done some googling on the whether hyperthreading turned or on off
> could increase or decrease server performance. I just wanted to get
> some advice from some of the admins that run the AMD64 Debian port.
> (With an Intel em64T chip of course)
> Some say that if you run a database server, that sometimes
> hyperthreading could decrease performance.
> Something about the cache sharing could impeed overall speed.
> Any truth to this?
> I'm running a sarge AMD64 box that is mainly used as a
> File, Web, email box. (no database)
> Running kernel 2.6.15-1-em64t-p4 from sid.
> Do you think going to a smp kernel will make things better or not?
> or does it really make a difference?

The only way to reliably tell is to try it. Hyperthreading helps some things 
and hurts others.


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