>Writing to contiguous slots and over allocation is mentioned, but unless I >missed it the "old" ROT (and health check) of not having more than 30% >of the slots allocated is not specifically addressed. Certainly with 4K >pages (for the most part) and 3390-27 (or bigger) that 30% ROT doesn't >apply anymore? 50% of a mod-27 is still a helava lot of free slots.
I think it still applies. My understanding has always been that the 30% usage (after which paging effectiveness drastically drops) applies to the algorithm used on the in-storage control blocks to pick the next free slot in a page data set. Unless that algorithm was redesigned, 30% of 44.9GB per page dataset is what you should not exceed (just as the health check says) in AUX usage. Redesign of that is IMHO unlikely, just as using more than 2 IOs on a page data set simultaneously would require (an unlikely) redesign. >Sometimes the need for the appearance of an "autonomic, self-healing" system >becomes more important than the need for an "autonomic, self-healing" system. >;-) But, you're also saying close to 50% of health checks are useful, so that's >good thing. I consider about 30 of the 180-200 checks (1.12) useful. Otherwise I'll stay out of *this* discussion. Barbara ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
