Re: HyperThreading and Arriba?

On Jan 8, 2004, at 2:02 PM, Clint Byrum wrote:
> 1) Isn't Arriba the total processing power on the box, not per CPU?

Yes.

> 2) 10% is nice, and well within the expectations. I'm just wondering if
> we couln't get more out of these machines. Is anyone else using
> HyperThreading P4's with mod_backhand/apache and seeing different
> results? I understand that this is highly application dependant due to
> the nature of HyperThreading.

The Arriba is calculated only once.  If you enable hyperthreading, you 
should delete the "arriba" file that holds that number for it to be 
recalculated ont hat box.

> 3) Should we experiment with byCPU or byBusyChildren? I tend to think
> byLoad makes the most sense, since these boxes run some database things
> that might not register as well with BusyChildren.

use byBusyChildren

> Thanks everyone (and thanks to the developers for mod_backhand. ;)

You are welcome.

// Theo Schlossnagle
// Principal Engineer -- http://www.omniti.com/~jesus/
// Postal Engine -- http://www.postalengine.com/
// Ecelerity: fastest MTA on earth