RSM_REAL

Description:

The REAL setting in IEASYSxx, which controls the amount of central storage that can be allocated concurrently for ADDRSPC=REAL (V=R) jobs.

Reason for check:

IBM® suggests that the REAL setting should be set to 0. However, this would not be valid if you have a need to run V=R jobs. Setting REAL=0 in IEASYSxx will improve performance.

z/OS® releases the check applies to:

z/OS V1R4 and later, in both ESA and z/Architecture® modes.

User override of IBM values:

The following shows the default keywords for the check, which you can override on either a POLICY statement in the HZSPRMxx parmlib member or on a MODIFY command. This statement may be copied and modified to override the check defaults:

UPDATE,
    CHECK(IBMRSM,RSM_REAL),
    INTERVAL(ONETIME),
    SEVERITY(LOW),
    DATE('date_of_the_change')

Parameters accepted:

No.

Reference:

For more information on real storage, see z/OS MVS Initialization and Tuning Reference.

Messages:

This check issues the following exception messages:

IARH101E

See the IARH messages in z/OS MVS System Messages, Vol 6 (GOS-IEA).

SECLABEL recommended for multilevel security users:

SYSLOW - see z/OS Planning for Multilevel Security and the Common Criteria for information on using SECLABELs.