Accumulating Statistics: Statistics Facility in CONTROL-M

Accumulating Statistics: Statistics Facility in CONTROL-M

As part of the post-processing 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, a statistics utility may be used to scan and analyze the IOA Log
file. This utility gathers information about the start time of each job, its
elapsed run time, CPU utilization time, and so on. The utility places this
information in the Statistics file, where averages of these values can be
maintained for each job.

Statistics facility averages may be used for several purposes:

• to determine if the execution time of a job falls outside of a statistically
normal range of time, which would indicate an execution delay or
problem)
• to calculate DUE-IN time for use by the Deadline Scheduling facility,
which is discussed under “Automatic Job Flow Adjustment” on
page 1-35
• to determine when a shout message must be issued based on the elapsed
time of the job
• to simulate job executions and forecast the impact of changes to the
system (described briefly below)
• to determine if a job can complete execution before the CONTROL-M
planned shutdown time (QUIESCE command)