Identifying Internal Service Classes

SRM groups some work not defined in the service policy into internal service classes. The internal service class names are:

$SRMDInn - resource group discretionary

Contains all work in a resource group with a discretionary goal. There is one $SRMDInn class per resource group with discretionary work.

$SRMDI00 - general discretionary

Contains all work assigned a discretionary goal, but not assigned a resource group. There is always one $SRMDI00.

$SRMDISC - SYSOTHER service class

Contains all work not otherwise assigned to a service class.

$SRMSnnn - server

Contains all address spaces serving the same set of service classes. That is, the server address space (s) could be serving more than one service class. For example, 2 AORs may be serving the same 3 CICS® service classes. Those 2 AORs make up one $SRMSnn service class.

An address space can belong to one internal server service class, but can move from one class to another. The number of $SRMSnnn service classes depends on how many external service classes are served and by how many combinations of server address spaces.

$SRMDUMP - SDUMP

Contains only SDUMP.

$SRMBEST - best

Contains the special system component address spaces, unless they are explicitly assigned to a service class in the service policy. This includes the SYSTEM service class.

$SRMGOOD - good

Contains the STC subsystem type default work, if there was no default service class specified in the classification rules for STC in the service policy. This is the SYSSTC service class.

$SRMGOD1-5 - good

Contains the work defined for service classes SYSSTC1, SYSSTC2, SYSSTC3, SYSSTC4, and SYSSTC5. For further information refer to z/OS MVS Planning: Workload Management.