The size of REGION parameter for batch report writer
Do you have some calculation formula or guideline to decide the size of REGION= parameter?
I usually recommend REGION=0M to acquire best performance.
There is no specific recommended region size for Batch report Writer or guide lines for the Region setting.
There is a message produced at the end of the job which gives details of the Storage the job used .
Use this to get an understanding of the Storage Use.
Additonally there is details of CPU and Ziip us.
DBG98003I 07:38:50 ROUTINES USED 141239384 BYTES OF GETMAIN STORAGE