Extended job runtimes for ICEGENER and DFORST after activation of CA Allocate

Products

• Allocate DASD Space and Placement

Issue/Introduction

After activation of CA Allocate in production environment, batch users experience extended job runtimes when using ICEGENER and DFSORT for example.

Environment

Release : 12.5

Component : CA Allocate DASD Space and Placement

Cause

Performance degration and extended runtime can be caused by LSAPCE calls in the ASR routine.

Resolution

Limit the number of LSPACE calls in the ASR routine for larger Data sets for example or replace LSPACE with DIF processing.

Following sample ASR code to use DIF in ALLOC, DEFINE, EOV, EOV_VSAM and EXTEND environments:

FILTLIST &DIFENVIR INCLUDE(AL*,D*,E*) 
IF &VAMENVIR = &DIFENVIR THEN DO 
   SET &REDUCE_BY = 10 
   SET &MINIMUM_PERCENT = 10 
END

Additional Information

For Details see DOES IT FIT (DIF) Support