[CentOS] SAR

[Les Mikesell]

On Wed, 2006-06-07 at 13:07 -0400, Sam Drinkard wrote:
> Folks,
> 
>     At what point in iowait should I start to worry about having a 
> bottleneck, or is this something that can't be answerd with a single 
> integer?  According to sar, after my last reboot to turn off 
> hyperthreading as a test, at one time, I see 4.9% iowait, but then one 
> minute later, it droped back to 0.01%, and rarely even gets to 1.0%, at 
> least what I remember from yesterday.  ?

Generally iowait should be your bottleneck since it is the most
expensive thing to fix.  Except for special cases like number
crunching in RAM and sometimes graphics, your disk and network
i/o are the slow parts. 

-- 
  Les Mikesell
    lesmikesell at gmail.com