Robert: I found a long time ago that there was a bug in IBM's switch program. Someplace along the line I think they fixed it but sometime after that they dropped it. Its been years so my memopry is not to clear on the "bug". From a scratchy memory when the first first startup the switch program would issue the I SMF command and the system was not far along enough for the command and if serves me it was a minor fix. I was too caught up in other work so after finding the issue I dropped it. The bell going off in the back of my head says IBM knew about it. Biut I could no longer find the exit source (long story and I will not waste my breath about the company I was working at at the time. I do remember the operators being totally oblivious about it though. The ex systems peoplewere well lets just say different. ed
--- On Tue, 11/2/10, Robert A. Rosenberg <[email protected]> wrote: From: Robert A. Rosenberg <[email protected]> Subject: Re: How long for SMF to switch To: [email protected] Date: Tuesday, November 2, 2010, 1:44 PM At 17:22 +0000 on 11/02/2010, Ted MacNEIL wrote about Re: How long for SMF to switch: > >1.5 minutes to actually switch the dataset seems excessive. > > Do you need the data right away? > For a batch-like process, 1.5 minutes, to me, does not seem to be worth > worrying about. The delay in doing the switch (and thus the dump if you have an IEFU29 Exit to automatically fire off the dump) is only one issue with a delay in doing the switch. A more important issue is that the data that will be written to the new SYS1.MANx dataset is queued in memory until the dataset is available. This means that you have a potential window of opportunity for data loss if the delay is extended and you run out of memory for storing the records or if the new file is not large enough to hold all the queued data (you want multiple [ie: 3 or more] MANx datasets as well as large ones). ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
