Lee,
 
I think that Steve's point is simply that you need to count the cost.  There
is definitely a cost associated with turning on the MI.  If you need to have
the information, then you need to count it in as part of the equation.
Remember Heisenberg:  "Measurement affects results".
 
Stan's tool, SHOT, is excellent for what it was intended.  However, it has
no data collection feature and doesn't offer capacity planning features
(unless you want to do it all by hand!).  Using a tool like SOS/3000 from
Lund will allow you collect all the data you need to actually do a capacity
study (using the PC product from Lund, Forecast/3000 Capacity Planner).
Forecast is a true capacity planning tool (using queuing network theory),
unlike RX/Forecast from HP, which simply does linear regression.
 
 
Bill Lancaster
 
At 10:36 AM 5/30/96 PST, you wrote:
>Steve - are you suggesting that the use of the MI for capacity planning
>is more wasteful of resources than we've been led to believe?  We
>depend upon SCOPE statistics for mapping resource usage and
>extrapolating that to a capacity plan and have done so for quite some
>time.  I haven't been concerned about SCOPE's use of CPU, but I also
>haven't considered that the MI is  as inefficient as has been implied.
>What alternatives are available without the MI?
>
>Lee Gunter      503-375-4498        [log in to unmask]
>HMO Oregon      503-375-4401  fax
>
>______________________________ Reply Separator
_________________________________
>Subject: Re: Measurement Interface
>Author:  Steve Cooper <[log in to unmask]> at ~INTERNET
>Date:    5/29/96 5:39 PM
>
>snip...
>
>Most of the time when people run these background jobs to collect
>statistics from the MI, they have effectively replaced their system
>with a smaller one, one or two models down the scale.  I hope they
>enjoy those graphs, because they are some of the most expensive graphs
>I can imagine.
>
>/snip...
>
>
---
Bill Lancaster         Lancaster Consulting
(541)926-1542 (phone)  (541)917-0807 (fax)
[log in to unmask]       http://www.proaxis.com/~bill