David --

All the measurements and goals work as if softcapping was not active. When
the cap is on, as you wrote, you are in control based on your service
definitions. When softcapping is in effect, you are "short of CPU", and the
lower importance work will slow down. That starts with "discretionary",
which is just that, work to run when the resources are available. While
softcapping the resources are not available. 

While WLM works the same, the consumption of CPU by other service classes
may decrease also; this lower CPU time and lower rate of consumption may
have other impacts on your definitions. 

-- 
Al Sherkow, I/S Management Strategies, Ltd.
Consulting Expertise on Capacity Planning, Performance Tuning,
WLC, LPARs, IRD and LCS Software
Seminars on IBM SW Pricing, LPARs, and IRD
Voice: +1 414 332-3062
Web: www.sherkow.com 

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