"Joel C. Ewing" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > I strongly disagree on the desirability of suppressing VSAM statistics > in these cases. It would be much better to display them while > indicating that they are incomplete. > > The delta in the LISTCAT VSAM statistics correctly reflects the activity > to the VSAM data set between two points in time, as long as you compare > between two points where the VSAM file is closed and also know there > are no intervening OPENs without a valid CLOSE. This is extremely > useful as an activity measurement tool, even if the absolute values are > missing counts from earlier accesses.
Most people don't do this. They look at the stats and make decisions. They don't look at the "delta" before and after using the data set. As I said earlier, the biggest place where we see the problem are people that do immediate shutdowns of CICS. You load a file with 100K records on Sunday night, and by Saturday night you've done 150K adds, 379K updates, and 75K deletions. Then you do an immediate shutdown and guess what you get? Stats that show 100K records in the file, no updates, no deletes, no splits, no nothing. > > I would hate to see one program ABEND make it impossible to get any > statistics from all VSAM datasets used by the program until those > datasets have been reorganized by unload/reload, as in some cases it may > not be practical to reorganize the files for weeks or months. Sorry, but the stats don't get updated on an ABEND. > > This also suggests that calling the statistics "INVALID" may be too > strong a pejorative, as all the counts reflect actual activity to the > file - it's just that they do not represent ALL the activity to the file. I'm afraid I don't understand how this doesn't make the results "invalid". If your gas gauge says 1/4 tank as your engine coughs and halts, wouldn't you consider your gas gauge registering "invalid"? Thanks, Mark Thomen Catalog/IDCAMS/VSAM Development ---------------------------------------------------------------------- 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
