In this article Jeff Lane presents a real life situation in which parallelism presented a performance dilemma. Do you tune for response time or reduced cost?
"Would you ever think that binding your on-line packages with DEGREE=ANY would cause your transactions to increase in elapsed time? Well it’s not just binding with DEGREE=ANY but a combination of available processors (GPs & zIIPs), and z/OS settings which can contribute to increasing transaction elapsed times."
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