CPU Load, kernel, and hardware questions

[Paul Querna]

Maxim Mass wrote:
> First of all, big thanks to everyone contributing to this project -- 
> this is a truly cool idea and it's helping our site performance a hell 
> of a lot. 
> 
> I'm currently running 10 3ghz Xeon machines with -- temporarily -- a gig 
> of ram each on the 2.4 kernel. My concern is that I'm seeing an average 
> of about 40% system cpu usage with only 2% usermode usage. Looking at 
> the stats, each box is being hit at roughly 1100 get/set requests a 
> second and reading about 71kb/s while writing 361kb/s.  Would moving to 
> 2.6 reduce cpu load? Turning off hyperthreading?

2.6 will reduce CPU load, assuming you have EPoll enabled correctly.

-Paul