>This problem scenario must be extremely rare. I've personally never seen it happen. Have you?
5 times in a one year span, circa 2.7/2.8 when the option was first introduced. You have to have a very busy I/O sub-system, and run all your processors at 100%. At the time, IBM was very conservative and told you to implement it in extreme cases. Now, with faster DASD, channels, and processors, I'd say "implement it", but don't schedule an IPL for it. And, don't worry about a 'mix'. . Questions? Concerns? (Screams of Outrage?) ---------------------------------------------------------------------- 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