MPOPTS parameter: Difference between revisions

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Line 5: Line 5:
<dd>X'7F'
<dd>X'7F'
<dt>Parameter type
<dt>Parameter type
<dd>System
<dd>User
<dt>Where set
<dt>Where set
<dd>On User 0's parameter line
<dd>User resettable
<dt>Related products
<dt>Related products
<dd>All
<dd>All

Revision as of 10:54, 25 July 2018

MP user language options

Summary

Default value
X'7F'
Parameter type
User
Where set
User resettable
Related products
All
Introduced
Model 204 V4.1 or earlier

Description

The MPOPTS parameter setting is used to tune system multiprocessing. The SOUL compiler strategy offloads as much work as possible to subtasks. You can set the MPOPTS parameter to modify this strategy for a particular section of code, particularly:

  • Nested loops
  • MP=NO $functions
  • Mixed mode statements

This parameter applies only to z/OS. Valid settings of MPOPTS are:

SettingMeaning
X'01' Loops containing serial statements
X'02' Calls to subroutines containing serial statements
X'04' MP=NO $functions.
X'08' Store Record and Delete Record statements
X'10' field level update statements - Add Field, Change Field, Delete Field
X'20' Read, Print Screen, Print Menu, and Reread statements
X'40' Read Image and Write Image statements
X'80' Produce compilation warning messages for serial statements

An MP OPTIONS SOUL statement can temporarily override the MPOPTS parameter. For more information on multiprocessing concepts and parameters, refer to Multiprocessing (MP/204).