We run a 4-system production sysplex using z/OS/JES2 1.11 augmented by Thruput 
Manager.

As a result of an application area reporting one of their critical jobs 
abending S822 (issue since corrected), we found ourselves noticing a very old 
parm value: default REGION size for all classes via the JOBCLASS statement. 
It's still set to an 'ancient' value of 7M! Haven't assessed how many of our 
jobs simply accept the default, but I'm thinking of changing the default region 
size for all jobclasses  to a more current value of 32M. In this day and age, 
not sure how many programmers have a handle on "used virtual storage", and not 
sure it should still matter! Jobs simply shouldn't fail because of "region 
size" in this day and age IMHO.

I don't know how other shops handle this, and would like to read your 
comments/thoughts/opinions on my suggested "new" default region size.

Cheers,

Stan Haynes
z/OS Systems Analyst
Canada Revenue Agency




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