VSAMRLS_SHCDS_MINIMUM

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 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(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