Re: [CentOS] SAR

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.