It seems like IBM has addressed my both of concerns in z/OS 1.8.
Unfortunately, I am still at 1.7 and haven't reviewed (until now) the
new
Capabilities.

Thanks for prompting me to review the info.


<snip>
> I am generally opposed to resource groups, however, they do have their
> uses. I find them useful for your purpose (guaranteeing a 
> minimum amount
> of service). I do not find them useful for "capping" a workload.
> 
> The drawbacks I see are:
> 
> 1) The specifications are in RAW service units( last I heard) rather
> than weighted service units.
> 
> 2) They must be constantly adjusted whenever a processor changes.
> 
> HTH,

In z/OS 1.8, it appears that I can make an RG based on CPU% instead of
MSUs.
</snip>

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