RSM_RSU

Description:

The RSU setting in IEASYSxx, which controls the amount of central storage that can be reconfigured.

Reason for check:

IBM® suggest that the RSU setting should be set to 0. However, this would not be valid if you have a need to reconfigure storage. Setting RSU=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 sample shows the defaults for customizable values for this check. Use this sample to make permanent check customizations in an HZSPRMxx parmlib member used at IBM Health Checker for z/OS startup. If you just want a one-time only update to the check defaults, omit the first line (ADDREPLACE POLICY) and use the UPDATE statement on a MODIFY hzsproc command. Note that using non-POLICY UPDATEs in HZSPRMxx can lead to unexpected results and is therefore not recommended. End of change

ADDREPLACE POLICY[(policyname)] [STATEMENT(name)]
UPDATE
CHECK(IBMRSM,RSM_RSU),
INTERVAL(ONETIME),
SEVERITY(LOW),
DATE('date_of_the_change')

Parameters accepted:

No.

Reference:

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

Messages:

This check issues the following exception messages:

IARH102E

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.