GRS_GRSQ_SETTING

Description:

Examines the system's GRSQ setting. The check generates an exception if the GRSQ setting is not set to CONTENTION in a GRS=STAR mode environment. This is a one-time check that is also run during a migration from GRS=RING to GRS=STAR.

Reason for check:

Having a GRSQ setting of CONTENTION will shorten the amount of time required for SVC Dump processing.

z/OS® releases the check applies to:

z/OS V1R8 and later.

Type of check:

Local

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(IBMGRS,GRS_GRSQ_SETTING)
  SEVERITY(LOW) INTERVAL(ONETIME) DATE(20050202)
  REASON('YOUR REASON FOR MAKING AN UPDATE.')

Debug support:

Verbose support:

Parameters accepted:

Reference:

For more information on GRSQ, see z/OS MVS Planning: Global Resource Serialization.

Messages:

This check issues the following exception messages:

ISGH0315E

See the ISGH 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.