Mainframe, MVS and zOS Discussion

Hi

I am trying to create a small REXX which can calculate or pick the CPU time for a Job. To do this when I look at the job log of a Job, it shows like this:

While for the same job, in JESYSMSG the results are like this:

Why different times are reported. What is 0 HR 00 MIN 03.42 SEC indicates? If it not related to Started-time and Ended-time then where does it come from?

because they are different time measurements

started and ended give the ELAPSED time
the other gives the CPU time

that' s all

I think you need to do more research before attempting your REXX code. The job you posted ran for 2 minutes 25 seconds (from 10:09:53 to 10:12:18) and the program used 3.42 seconds of CPU time in those 2 minutes 25 seconds. However, the system used .18 seconds of CPU time for that program (which is what the SRB time represents) so the total CPU allocated to that job by z/OS was 3.60 seconds of CPU time. If you don't understand the difference between TCB CPU seconds and SRB CPU seconds, you definitely don't know enough to write REXX code yet.