VSM_CSA_CHANGE

Description:

Changes in the size of CSA or private (including the extended areas) since the last IPL.

Reason for check:

The values provided by IBM® are 1 megabyte and 10 megabytes for storage below the line and storage above the line, respectively. These value are helpful in determining when the module growth in LPA or the nucleus could reduce the size of the private area.

z/OS® releases the check applies to:

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

Parameters accepted:

Number of bytes with optional suffix (K,M) indicating the threshold at which changes in CSA or private below the line will result in an exception being issued. (keyword: BELOW)
Number of bytes with optional suffix (K,M) indicating the threshold at which changes in CSA or private above the line will result in an exception being issued. (keyword: ABOVE)
Default: BELOW(1M),ABOVE(10M)

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(IBMVSM,VSM_CSA_CHANGE),
INTERVAL(ONETIME),
SEVERITY(HIGH),
PARM('BELOW(1M),ABOVE(10M)'),
DATE('date_of_the_change')

Reference:

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

Messages:

This check issues the following exception messages:

IGVH102E

See the IGVH messages in z/OS MVS System Messages, Vol 9 (IGF-IWM).

SECLABEL recommended for multilevel security users:

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