Edward Jaffe wrote on 06/13/2006 06:18:52 PM: > > As implemented right now in z/OS, PER is system wide and not changed > when address space switching occurs (though that should be technically > feasible). But, what's to stop multiple GTFs in z/OS 1.6 and higher from > processing a single PER event?
Nothing. Each instance of GTF is treated as an independent agent, capable of using software filtering to disregard events of no interest to it. It sees all events that are of interest to any active instance of GTF, so running multiple instances is certainly going to incur higher monitoring costs. The rationale for supporting this is that a large, complex system may have several nagging problems, and it should be possible to decide to collect data targetted to solving each of them - if you're willing to pay in the coin of the realm - performance degradation. Bob Wright - MVS Service Aids ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
