On Sun, 12 Mar 2017 12:47:25 -0700, Charles Mills wrote: >Ratio of virtual address space to real memory is largely independent of >addressing mode. Potentially 64-bit addressing makes the problem worse in that >a 31-bit program can only map 2GB of virtual onto whatever backing real is >available, but a 64-bit program could potentially map 9 exabytes, more or less. > Sure. It all depends on the programmers' choice of technique. Many Rexx programmers have the often bad habit of reading an entire file into a stem, processing that, even if merely sequentially, then writing out results. This becomes adverse when it's paging-limited. This is not a good way to compute the total of a few hundred million numbers presented in a file.
DFSORT would surely do better as a consequence of great design resource expended. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
