Adjusting OSAM options

To adjust OSAM options, change the appropriate parameters in the OPTIONS control statement. Then put the new control statement in the appropriate data set.

The appropriate data set depends on whether:

  • DFSVSAMP data set in a batch system
  • IMS.PROCLIB data set with the member name DFSVSMxx in an online system

The OSAM options you can choose are described in OSAM options. Performance implications of each OSAM option are also discussed there. To improve performance, reread that topic and reassess the original choices you made. You cannot specifically monitor any OSAM options.

Detailed information about how to code the OPTIONS control statement is in IMS Version 15.4 System Definition.