Elapsed time is exactly what it says it is, the amount of time that elapsed for the job stream, i.e. from when it started to when it ended.
The cost of a job is usually calculated by your capacity and planning team who have all of the relevent information available to do so.
1) Still I am not getting what is elapsed Time, Because in one of my job, below is the start time and end time, as per this start and end time job's elapsed time should be .13 but in the JESMSGLG it is displaying TOTAL ELAPSED TIME= .2
Joined: 14 Mar 2007 Posts: 8657 Location: Back in jolly old England
Maybe 13 seconds is approximately 0.2 minutes
SRB service units, TCB service units, distributed allocation of OS service units, I/O service units, elapsed time of tape drive allocation, amount of data written to tape or number of tapes used, amount of DASD resource consumed, number of pages printed, proportonial power related costs, proportional SW license costs .......... ad infinitum
Each and every element of job cost is site specific, as is which elements are actually used for chargeback calculation, hence my indication that you speak to the people who know the site specific information.
Joined: 22 Apr 2006 Posts: 6258 Location: Mumbai, India
Costs include initiator use, cpu cycles, i/o, etc. What that cost is, is determined by someone in your organization.
There is one more term - CPU time, this is time for which the CPU was busy executing the task. It does not take into account the time spent in waiting for I/O (disk IO or network IO). Since I/O operations, such as reading files from disk, are performed by the OS, these operations may involve noticeable amount of time in waiting for I/O subsystems to complete their operations. This waiting time will be included in the elapsed time, but not CPU time. Hence CPU time is usually less than the elapsed time.
But in certain cases, the CPU time may be more than the elapsed time ! When multiple threads are used on a multi-processor system or a multi-core system, more than one CPU may be used to complete a task. In this case, the CPU time may be more than the elapsed time.