[hobbit] vmstat graphing with CPU io wait

[Daniel J McDonald]

On Tue, 2005-01-25 at 08:27 -0500, Tom Georgoulias wrote:
> Henrik Storner wrote:
> 
> <snip>
> 
> Thanks for the explanation of larrd.  It helped a lot.
> 
> > Where do you get the I/O wait information from ?
> 
> On RHEL3 (procps-2.0.17-10), there is a value for it in column 14 of 
> vmstat's output, labeled "wa" under "cpu", so I modified a section of 
> larrd-0.43c's vmstat-larrd.pl so it'd recognize this value and use it 
> when dealing with rhel3 systems.  I hacked my client's vmstat larrd bf 

Actually, that is present in all kernel 2.6 versions, e.g. Mandrake 10.0
and 10.1.  I'd love to be able to capture that - I beat on bb-central
for quite a while trying to track it.

Tracking wait state is great for figuring out which boxes need more ram.

-- 
Daniel J McDonald, CCIE # 2495, CNX
Austin Energy

dan.mcdonald at austinenergy.com