Query related elapsed time and Job cost

banand · New User Joined: 05 Jun 2007 Posts: 28 Location: Mumbai

Hi,

1) Can you please let me know what is Elapsed time?.

2) Is job cost present in the JESMSGLG is the accurate/actual cost?, because one of my senior member told me that it is not the actual cost, If so then how we can find the actual cost of the Jobs?

Thanks
Brit

expat · Posted: Tue Sep 16, 2008 5:59 pm

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.

banand · New User Joined: 05 Jun 2007 Posts: 28 Location: Mumbai

expat · Posted: Tue Sep 16, 2008 6:47 pm

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.

banand · New User Joined: 05 Jun 2007 Posts: 28 Location: Mumbai

Thanks A lot

Anuj Dhawan · Posted: Wed Sep 17, 2008 11:12 am

Hi,

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.

Anuj Dhawan · Posted: Wed Sep 17, 2008 11:26 am

Hello again,