[Orca-users] Re: What is "disk run percent"?

[Blair Zajac]

The disk run percent is measured as the percent of time in a given
time interval that the disk is working on a request.  This is the
iostat %b measurement and is sometimes called the active/run queue
utilization or run busy percentage.  It varies between 0 and 100%.

I've updated the

http://www.gps.caltech.edu/~blair/orca/docs/orcallator.html

page with some more information and links to articles discussing these
disk measurements:

http://www.sunworld.com/swol-06-1996/swol-06-perf.html
http://www.sunworld.com/swol-09-1997/swol-09-perf.html
http://www.sunworld.com/swol-08-1999/swol-08-perf.html

Regards,
Blair

dempsey at kodak.com wrote:
> 
> From: dempsey at kodak.com
> 
> http://www.gps.caltech.edu/~blair/orca/docs/orcall
> ator.html#disk_run_percent
> does not tell me what "Disk Run Percent" is, nor how it is calculated.
> I don't know how to interpret the graph (other than to say, well, if
> c1t0d0
> has my critical app on it, and performance is an issue, then, yep,
> it's
> getting pounded).
> 
> Please update the page with information about where the data is
> obtained
> and what it means.
> 
> Thanks,
> Rich
> 
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