RRS_DUROffloadSize

Description:

The check evaluates the size of the Delayed UR log's offload data set.

Reason for check:

The size of the Delayed UR log's offload data set should be at least as large as the space allocated for the log stream's CF structure. Why? Because a small offload data set may cause multiple offload data sets to be created for each offload of the CF. The increased overhead in allocating data sets can degrade offload performance and the performance of RRS when reading the log stream.

z/OS® releases the check applies to:

z/OS V1R4 and later.

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(IBMRRS,RRS_DUROFFLOADSIZE)                                 
    SEVERITY(LOW),INTERVAL(8:00),DATE('date_of_the_change')
    REASON('Your reason for making the update.')

Parameters accepted:

Reference:

For more information, see z/OS MVS Programming: Resource Recovery.

Messages:

This check issues the following exception messages:

ATRH02E

See the ATRH messages in z/OS MVS System Messages, Vol 3 (ASB-BPX).

SECLABEL recommended for multilevel security users:

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