Duration. Seems simple enough: how long do I give a transaction to get done? The reality is somewhat more complex. Firstly, the duration is not wall-clock time, it’s weighted Service Units. And what are your ‘weights’ (coefficients) anyway?
Are you aware that, as of z/OS 2.5, these variables become fixed by IBM? If yours are different – they will change – along with your accounting, if it’s based on service units. Further, every machine is different: have you checked durations since your last upgrade?
Multiple periods are one of the most powerful – and dangerous – tools in the performance analyst’s arsenal. They can ensure critical work gets done and runaway work can’t take over. This webinar provides a timely update to setting up or reviewing this critical area.
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