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Query on the REGION size parameter -- URGENT!

 
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Siva219734

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Joined: 27 Jul 2008
Posts: 5
Location: Mumbai

PostPosted: Wed Feb 03, 2010 1:47 pm    Post subject: Query on the REGION size parameter -- URGENT!
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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
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gcicchet

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Joined: 28 Jul 2006
Posts: 1703
Location: Australia

PostPosted: Wed Feb 03, 2010 2:11 pm    Post subject:
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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
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enrico-sorichetti

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Posts: 10210
Location: italy

PostPosted: Wed Feb 03, 2010 2:28 pm    Post subject: Reply to: Query on the REGION size parameter -- URGENT!
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Quote:
Query 2 : Is there any chance that the Job class(CLASS=P) has a limitation set on the memory allocation?

classes and their properties are installation dependent, so we have noo way of knowing about them,
ask Your support
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Siva219734

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Joined: 27 Jul 2008
Posts: 5
Location: Mumbai

PostPosted: Wed Feb 03, 2010 2:30 pm    Post subject:
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HI Gerry,

Thanks for your reply and suggestion.

It is helpful.

-Siva
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enrico-sorichetti

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Joined: 14 Mar 2007
Posts: 10210
Location: italy

PostPosted: Wed Feb 03, 2010 2:32 pm    Post subject: Reply to: Query on the REGION size parameter -- URGENT!
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Quote:
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?


the same info could have been easily found in the jcl manuals
( guide and reference ) link at the top of the page


and since You claimed urgency, faster than a forum reply
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