-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On
Behalf Of Kent Ramsay
Sent: Thursday, March 15, 2012 12:12 PM
To: IBM-MAIN@bama.ua.edu
Subject: Hypothetical Performance Question
Hi,
A hypothetical question but first the setting: A customer has two jobs auto
Hi,
A hypothetical question but first the setting: A customer has two jobs
auto-submitted within five minutes of each other. Job 1 grabs the dozen or so
data sets and executes, leaving Job 2 with a formal waiting for data sets
situation. Obviously, when Job 1 finishes, Job 2 actually starts.
Subject: Hypothetical Performance Question
Hi,
A hypothetical question but first the setting: A customer has two jobs auto-
submitted within five minutes of each other. Job 1 grabs the dozen or so data
sets and executes, leaving Job 2 with a formal waiting for data sets
situation. Obviously
None. Allocation has enqueued on the dataset(s), which is handled by
GRS, and sits there waiting for the ENQ to be completed. Allocation does
nothing explicitly (polling or so), but is signalled when the datasets
are available. So this will not cost any CPU. The fact that the job is
in the system,
There are several issues here. Resource usage can (and does) mean
several things. As to CPU time minimal at best then there are other
resources like time drives and dasd space (among others) that
reserve for the exclusivity of the job. Simple example: job 2 has
(example) 3 tape drives and
5 matches
Mail list logo
