The wisdom was "There is no convenient way to guarantee contiguous real frames in a z/OS application."
It makes me wonder (apologies to Led Z) what ever happened to the available double frame queue... That thing appeared in MVS/XA, which I suppose was for the segment tables of new address spaces. I imagine it would have been required through ESA until z/Architecture radically changed that whole situation. XA saw the segment size go from 64K to 1M, and 8K was needed to get 2048 entries (to cover the 2G address space) in a segment table. With DAT table entries doubling in size (due to 32-bit going to 64-bit) you'd expect that the OS still needs to be able to find multiple adjacent pages for new DAT tables, but I suppose that facility is not made available to applications. How typical of the world to not realize that /my/ application needs access to such things because it is the most important workload ever run on a computer... or not, as the case may be. :) Cheers, Greg ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
