Accumulating Statistics: Statistics Facility

As part of the postprocessing for each job, Control-M determines the elapsed run time of the job. All accumulated information regarding job execution, including the elapsed run time, is written to the IOA Log file.

Periodically, statistics utility CTMJSA, which was mentioned in Chapter 6, "Navigating The Active Environment," and which is described in detail in the Control-M chapter of the INCONTROL for z/OS Utilities Guide, can be used to scan and analyze the IOA Log file. This utility gathers information about start time, elapsed run time, CPU utilization time, and so on, for each job. The utility places this information in the Statistics file, where averages of these values can be maintained for each job.

Statistics facility averages can be used for several purposes, such as

• determining if the execution time of a job falls outside a statistically normal range of time, which would indicate an execution delay or problem
• determining when a shout message should be issued based on the elapsed time of a job
• simulating job executions and forecast the impact of changes to the system.
• determining if a job can complete execution before the Control-M planned shutdown time (QUIESCE command)
• calculating DUE-IN time for use by the Deadline Scheduling facility

  For more information, see the discussion on Automatic Job Flow Adjustment in the introductory chapter of the Control-M for z/OS User Guide.