MPOPTS parameter

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Summary

Default value
X'7F'
Parameter type
System
Where set
On User 0's parameter line
Related products
All
Introduced
Model 204 V6.1 or earlier

Description

The MPOPTS parameter setting is used to tune system multiprocessing. The User Language 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/ESA. Valid settings of MPOPTS are:

SettingMeaning
x'01'LOOPs containing serial statements
X'02'Calls to subroutines containing serial statements
X'04'No $functions.
X'08'STORE RECORD and DELETE RECORD statements
X'20'READ, PRINT SCREEN/MENU, and REREAD statements
X'40'READ and WRITE IMAGE statements
X'80'Produce compilation warning messages for serial statements

An MP OPTIONS User Language statement can temporarily override the MPOPTS parameter. For more information on multiprocessing concepts and parameters, refer to the Model 204 System Manager's Guide.