? GTF? Generalized Trace Facility? Is there another GTF in z/OS?
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of Paul Gilmartin [0000000433f07816-dmarc-requ...@listserv.ua.edu] Sent: Thursday, June 11, 2020 2:21 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: "Everyone wants to retire mainframes" On Thu, 11 Jun 2020 17:47:46 +0000, Seymour J Metz wrote: >I call that the "GTF effect"; the problem never manifests when I have >diagnostic measures in place to capture failure data. > GTF? Generalized Trace Facility? A colleague once used the term "Heisenberg effect" for a performance monitor that reported that most of the CPU time was being spent in the performance monitor. And I struggled with a vendor compiler when my program arithmetic checked in optimized mode but produced the result I intended in debug mode. Vendor support told me (correctly) that the construct I (tried to) use was documented as "unpredictable". WAD? On Thu, 11 Jun 2020 17:51:13 +0000, Seymour J Metz wrote: >> DBD or PSB library. > >In a kinder, more gentle world, the message would tell you which. > I consider "either-or" messages irresponsible. Even in the case where a single test and BC instruction may detect significantly different errors. More likely, middleware fails to distinguish or preserve distinct reason codes supplied by the base level. The M&C Reason explanations are rife with "either or". -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
