Point is that it does. More, it makes its decisions pragmatically based on the reality at that point in time.
No such process can get it 100% right %100 of the time. But it should consistently do it far better than a human after the fact. For one thing, it is difficult for a human to weigh all of the factors in a constantly shifting environment. Consider: SORT A kicks off, talks a look at the environment, and elects to use x resources. Process B kicks off and drives up the system paging rate. Sort C now kicks off, sees the problem, and elects to use a different mix of resources. Again, SORT C is looking at the environment and the nature of the task at hand and will try to make the most efficient use of the resources available. Enter Process D which again drives up the system page rate. Now SORT E has a completely new challenge. After the fact, we might second guess what SORT A did. But is that really what we want to do? Or should we consider the collective behavior of all of the sorts in the mix? Just my thoughts. HTH and good luck. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Khu Yi Ming Sent: Saturday, January 14, 2006 11:14 AM To: [email protected] Subject: Re: DFSORT performance data Please correct me if I'm wrong but as far as I can tell DFSORT only queries the system about paging activity BEFORE starting the sorting process, to decide if it should use additional memory (ie. data space or memory objects sorting) to help performance but otherwise virtual storage remains constant throughout most of the sorting process (with DFSORT to adjust the storage up to the DSA limit depending on the input data being sorted ). Only the size of the data space or memory object is adjusted dynamically as necessary, in response to system paging levels. Regards, Yi Ming >Why? The sorts use virtual/main very efficiently. I think I read that >both will actually adjust if there is a system paging problem. ---------------------------------------------------------------------- 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
