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 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(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.