Differences in runtime can be a variety of reasons. Do you have any performance reporting tools like STROBE or do you know how to use RMF or SMF reporting functions? Do you have MICS or MXG?
More or less, it could be due to any of the following 1) Changes in file size 2) Changes in workload during this run 3) Changes in DB2 workload 4) Other performance issues in the system at the time. Tape or DASD used by this job can impact run time. 5) How busy was your system this time compared to last time it ran? The numbers 11.25 means 11 mins and 25 seconds. That in itself is not always an issue. Did you meet your SLAs for this job? Jobs can vary in runtime. You need to have a baseline that says "this job will usually run in 10 mins. If it runs over 20 mins it is a problem." Lizette -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Sascha Weng Sent: Wednesday, April 02, 2008 5:36 AM To: IBM-MAIN@BAMA.UA.EDU Subject: CPU-Time in z/Os-System. Is The Cpu Time In z/Os-systems A Meaningful Indication? It is the first time, that I write to this list and I am not quiet sure, if I am on the right place for asking my question. I hope not being off-topic. If so, please accept my apology for my ignorance in advance. I have a programm written in Cobol which runs monthly on a z/Os-System. The programm reads inputrecords and writes them in a database (DB2) and in different outputfiles. It consumes nearly the same numbers of input records every month. I wonder now, why there are so great differences in the consumed cpu-time. For example: Last month the programm consumed due to the job protocol 11.25 (what ever that means) and this month it consumed 16.33. Actually I expected the cpu time would be nearly the same. But there is this difference I can not explain. Any suggestions would be greatly appreciated. ---------------------------------------------------------------------- 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
