I agree. I don't think you can readily deduce the potential absolute CPU 
capacity impact from the SIIS % number. That's no doubt why IBM gave general 
guidance on how serious you should consider the problem rather than saying "oh 
this is costing you this many CPU seconds/MSUs//MIPS". My recommendation is to 
also consider the actual CPU consumption during the periods where there is a 
high SIIS% issue. I've seen cases where the SIIS % is quite high but the actual 
CPU consumption of the LPAR is relatively minor (e.g. perhaps a sysprog test 
LPAR or a relatively idle production LPAR) meaning that the net savings will be 
also relatively minor in the overall scheme of things. 

Scott Chapman

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