On Tue, 25 Jul 2000, Linh Pham wrote:
> On Tue, 25 Jul 2000, Nader Turki wrote:
>
> > Hi there,
> > My machine is a:
> > PII400MHz
> > 512MB ECC PC100 SDRAM
> > 9.1GB SCSI Ultra2 LVD
> > 36.4GB SCSI Ultra2 LVD
> >
> > I'm using the machine as a shell/web server it's pretty fast and nice.
> > I was thinking to upgrade to a Dual PII400MHz ... Will my machine be faster
> > with a Dual PII400MHz? I mean will I be able to tell the difference? If yes
> > ... will there be a big difference? Hope someone answer me soon.
>
> The performance increase depends on if the application(s) that you use are
> multi-threaded capable and if they are CPU intensive enough to matter.
>
> Having a second processor is nice to off-load some processing cycles to
> the other processor, leaving more cycles available on the primary
> processor for more important tasks (like RC5 :)
>
> In most cases, having a second processor in a web server is wasteful, but
> if you also run back-end applications (like database, web applications,
> etc.) it might help.
>
> // Linh Pham
> // http://closedsrc.org
Multi-threadedness isn't going to affect multiple CPU usage at all. If
you have multiple processes that are able to run, they will be able to run
in parrallel.
Since FreeBSD uses SMP, there is no "primary" and "secondary"
processors. Processor use is symentrical.
Since web servers employ multiple processes (Apache), it most definitely
can use multiple CPUs efficiently.
Tom
Uniserve
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