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DSPFD has activity counts, both physical and logical. Multiple logical to 1 physical means blocking. You can also get IO sizes from WRKDSKSTS, or from some PEX trace data, I think. At 08:31 AM 7/2/02 +1200, you wrote: >Hi Scott > >as a matter of interest are these jobs designed to take advantage of >blocking/sequential access to minimize disk access ? > >Anyone - is there a way to see that blocking is being utilized other than >trying to use the open files WRKJOB display ? > >Regards >Evan Harris > >>Charly, >> >>I use WRKDSKSTS and look at the % busy over a period of time, the guideline >>is that this number be below 40%. When we run certain jobs that move a lot >>of data around this number will be over 40% on almost all drives when >>sampled for a period of time. I'm not sure how to dig out the other >>information you have but I do know we have 12 of the 17GB drives in a single >>ASP that is 50% full. It took us awhile to figure out why the performance >>would go bad at times but finally figured out what was happening. I will >>say that in general our performance is really good but we have certain jobs >>that move a lot of data and they cause problems, we have even started trying >>to run certain jobs at night to minimize the impact. >> >>Scott Mildenberger
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