[hobbit] CPU Utilization Not Correct or Averaging

[James Wade]

True, but managers only see graphs, two have the same
values, one doesn't....

I like Hobbit, and I want to keep it out here, so
justification wise, I'd like to make it look the
same.

I did a quick look at cpu, the load average is low,
but the high cpu utilization is coming from to much
iowait time because they are writing to NFS shares.

How does Hobbit get CPU utilization? Does it 
compare idle, user, kernel, iowait, swap?
(Say from Top)

So for example, utilization might be 100 - idle time.
and take samplings from idle time?

Thanks ... James

-----Original Message-----
From: Rich Smrcina [mailto:rsmrcina at wi.rr.com] 
Sent: Friday, December 08, 2006 11:31 AM
To: hobbit at hswn.dk
Subject: Re: [hobbit] CPU Utilization Not Correct or Averaging

If the other tools are using their own functions to get the utilization, 
it could show much different values than the operating system provided 
features that Hobbit typically uses.  The sampling interval will also 
make a big difference.  It's best to compare apples to apples (as much 
as you can).

James Wade wrote:
> We have a couple other monitoring tools here
> 
> in-house; although Hobbit is catching on more.
> 
>  
> 
> I've had questions about CPU Utilization, The charts
> 
> don't seem to correlate with the other two monitoring
> 
> tools. As an example, The other tools show CPU
> 
> Utilization at 80% during a couple hours at night,
> 
> and Hobbit shows 26% Utilization.
> 
>  
> 
> Both the other Tools show 80% utilization during those
> 
> hours, but Hobbit doesn't.
> 
>  
> 
> I looked into this once before, and I know it depends on
> 
> how the data sampling is being done.
> 
>  
> 
> Any ideas on this would be helpful.
> 
>  
> 
> Thanks.James
> 
>  
> 
>  
> 
>  
> 

-- 
Rich Smrcina
VM Assist, Inc.
Phone: 414-491-6001
Ans Service:  360-715-2467
rich.smrcina at vmassist.com

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