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SMS · Beginner Joined: 16 Oct 2005 Posts: 53 Topics: 24

Hi,

Can anyone let know the difference between the
job start / end time, CPU time and the Elapsed time for a batch job please ?

I know that CPU time is the processor allocated time. Job start and end time is the actual time the job started and ended in mainframe. But elapsed (execution) time and JOB START/END time are sometimes coming differently.

Your inputs are appreciated.

Thanks,
SMS

expat · Posted: Thu Jun 14, 2007 2:02 am Post subject:

The elapsed time is the difference between the end time and start time.
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kolusu · Posted: Thu Jun 14, 2007 6:50 am Post subject:

SMS,

Check this link

http://www.mvsforums.com/helpboards/viewtopic.php?t=5624&highlight=elapsed

Kolusu
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Bill Dennis

SMS · Beginner Joined: 16 Oct 2005 Posts: 53 Topics: 24

Kolusu,

Thanks for the information

Bill,

The difference is close as you mentioned.
Normally to evaluate the performance of a job, elapsed time and cpu time will be helpful. But sometimes, few jobs, after starting the execution runs for long time than the usual time waiting for the cPU . In that case, how to evaluate the performance and calculate the actual elapsed time. Any suggestions please ?

Regards,
SMS

Nic Clouston · Posted: Fri Jun 15, 2007 3:47 am Post subject:

Actual elapsed time is just that - the difference between start and end time. If you want to exclude wait time that will depend on several fctors each of which will differ between runs eg. what else is running, priority of tasks/jobs, waits for enqueued datasets, other jobs/tasks with heavy resource usage, time of day etc.
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