Master address space

For each z/OS image, a master address space is started automatically by CQM or Guardium S-TAP for Db2. The first of these products that is launched on a z/OS image automatically initiates the master address space.

The master address space is a service address space that owns the shared memory objects where the data that is collected by the CQC is staged. The master address space acts as a placeholder for CQC resources and is similar to other master address spaces that are used throughout z/OS (for example, z/OSand Db2 have master address spaces).

The master address space:

• Never shuts down
• Does not execute any code during the course of existence, except for its initialization routines; therefore, does not have to be controlled by an installation
• Owns resources required by the CQC
• Does not require a formal shutdown and should not be canceled or forced to shut down during the operation of CQM or Guardium S-TAP for Db2. Forcing the master address space to stop causes the abnormal termination of all CQM or Guardium S-TAP for Db2 started tasks on the LPAR.