> On May 25, 2017, at 3:28 PM, Martin Packer <[email protected]> wrote: > > > > Back in the late 1980's there was a "coffee table book" on Data In Memory, > with a bunch of studies in. VSAM LSR was one of them. It was one of the > cases where CPU was SAVED across the range. > > Pure speculation but I doubt that became untrue subsequently. > > Cheers, Martin ————————SNIP—————————
Martin, Just as a follow on and a bit of trivia. When IBM came out with SAMe. We installed it ASAP. We had run many traces and SMF looking too see what would happen when you increased the number of buffers. After the SAMe installation we saw runtimes dramatically reduced by as much as 50 percent. The SRB time rose an imperceptibly. This was due to SAMe changing the default buffers in QSAM from 2 to (7 or 8) its been a long time. We did not see any additional real storage creep either. IF memory serves me correctly. Before SAMe came out our SE had done a study and got a orange book published as a result. My memory says that SAMe costed $52 a month and was well worth it. Yes there were some bugs that resulted but all in all a damn good piece of software. Ed ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
