Greetings, Take a look at II14008 as it describes this situation.
Thanks...Guy M. Gates Jr. TTI Z/OS Systems Programmer Phone: (817) 740-9000 x-4627 Email: [EMAIL PROTECTED] -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Imbriale, Donald (Exchange) Sent: Thursday, June 30, 2005 11:59 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: IBM VSAM Statistics are often Bogus How do you propose that they fix this? Don Imbriale >-----Original Message----- >From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf >Of Juraschek, David F >Sent: Thursday, June 30, 2005 12:36 PM >To: IBM-MAIN@BAMA.UA.EDU >Subject: IBM VSAM Statistics are often Bogus > >Are you z/OS 1.4 or later? >Have you looked at a LISTCAT for a lot of files lately? > >Have you noticed that the data for many files is ... well ... wrong? > >This is what I've been told: > " VSAM statistics have always been suspect for accuracy > even before OS/390. IBM decided in release Z/OS 1.4 to > show 'INVALID' instead of any statistics when certain statistic > fields were corrupted usually by not properly closing VSAM clusters." > >[Note: Even if it's IBM products and software doing the close, not some >poorly written, hosebag, application program!!) > > "IBM, in release Z/OS 1.6, has recognized that this has caused some > pain in the VSAM user community. Therefore they will show the invalid > statistics but they will be properly flagged as invalid. The invalid > statistics can only be repaired by reorg or export/import." > >That's right folks. You'll see "*INVALID*" in the stats for many VSAM >files in z/OS 1.4 and later. As of z/OS 1.6, with relatively current PTFs >applied, you can now see bogus, invalid and inaccurate statistics again >from LISTCAT, with the STATISTICS area of the display flagged >as: 'STATISTICS (* - VALUE MAY BE INCORRECT)'. > >It's like going to a major fast food hamburger chain and finding out all >the burgers are made from sawdust. "Oh, our ordering and distribution >system has had a problem for years. They've been adding way too much >sawdust for some time now. That's the way it is and has been for quite >a while - you just didn't know it and we've either been reporting >no information - or misinformation about what is really in your burger. >We have no intention of fixing this because we're too busy concentrating >about adding new products to our menu now, and we don't want to think about >those darn burgers too much. Would you like fries with your sawdust ... >er ... burger?" > >If IBM can devote the time and attention to releases of the OS, one would >think that they are capable of fixing this problem - a long, long time ago >when they were first aware of it. > >Doesn't this bother anyone else but me? > *********************************************************************** Bear Stearns is not responsible for any recommendation, solicitation, offer or agreement or any information about any transaction, customer account or account activity contained in this communication. *********************************************************************** ---------------------------------------------------------------------- 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
