VSAMRLS_SHCDS_MINIMUM_SIZE

Description:

The check detects SHCDS that are not big enough on your system.

Reason for check:

If the SHCDS is too small, the system may potentially experience problems, such as performance degradation. The initial size of the SHCDS needs to be at least 13 MB. A larger size should be used if there are more than 6 systems in the sysplex.

z/OS® releases the check applies to:

z/OS V1R9 and up.

Parameters accepted:

Yes

PARM(NUMOFRDS): Specify an integer from 1 to 3000 inclusive to indicate the average number of recoverable data sets open across the sysplex.
PARM(NUMOFRSS): Specify an integer from 1 to 100 inclusive to indicate the average number of recoverable subsystems running across the sysplex.

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(IBMVSAMRLS,VSAMRLS_SHCDS_MINIMUM_SIZE)
SEVERITY(LOW) INTERVAL(24:00) DATE('date_of_the_change')
PARMS('NUMOFRDS(100),NUMOFRSS(10)')
REASON('Your reason for making the update.')

Debug support:

Verbose support:

Reference:

For more information, see the section on "Defining Sharing Control Data Sets" in z/OS DFSMSdfp Storage Administration.

Messages:

This check issues the following exception messages:

IGWRH0151E

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

SECLABEL recommended for MLS users:

SYSLOW