Performance options for data management and program specification blocks

You can override the system definition specifications for individual database DMBs and PSBs using the RES parameter on the IMS procedure.

System definition lets you specify individual database DMBs and PSBs to be resident with the DATABASE and APPLCTN macros, respectively. You can override this specification with the RES parameter. The IMS procedure generates this as a null parameter; the default is RES=Y.

Request that all the control blocks are not to be made resident by specifying RES=N. You might do this when executing a test system or if storage is temporarily constrained.