Query on the REGION size parameter -- URGENT!

Siva219734 · New User Joined: 27 Jul 2008 Posts: 5 Location: Mumbai

Hi All,

I have a JCL as shown below.

//EFBTH JOB (10403),'RATAR JOB',MSGLEVEL=(1,1),MSGCLASS=H,
// REGION=0M,CLASS=P,NOTIFY=&SYSUID,
//S1 EXEC PGM=PROG1,REGION=20K
//DD1 DD DSNAME=A.B.C,DISP=OLD
//S2 EXEC PGM=PROG2,
//DD2 DD DSNAME=MYDS2,DISP=OLD

Query 1 : Please advise, in case the REGION=0M set in the job card is over ridden by the REGION=20K in the step1(S1) and the same REGION=20K is used in all subsequent steps?

Query 2 : Is there any chance that the Job class(CLASS=P) has a limitation set on the memory allocation?

Thanks in advance

Regards
Siva

gcicchet · Senior Member Joined: 28 Jul 2006 Posts: 1198

Hi,

query1 - A REGION= value on the JOB statement will override any REGION= specified on an EXEC statement in the job

A value of 0K or 0M will allow the program to request the largest available region size, however this specification should be used with caution. Check the OS/390 Initialization and Tuning Guide

Gerry

enrico-sorichetti

Siva219734 · New User Joined: 27 Jul 2008 Posts: 5 Location: Mumbai

HI Gerry,

Thanks for your reply and suggestion.

It is helpful.

-Siva

enrico-sorichetti