The GRSQ keyword is relevant only for star mode. It is ignored for ring and none mode. When the SDATA=GRSQ option is specified, the GRSQ keyword collects global resource serialization information during SYSMDUMP and SVC dump processing. ENQ resource information from all systems in the global resource serialization complex is gathered and placed into the dump. This can be time consuming when running in star mode because global resource serialization needs to collect and merge information from all systems in the sysplex. The time it takes increases as more systems are added to the sysplex or the number of concurrent ENQs increase, or both. The GRSQ keyword allows the installation to limit the data collected and therefore lessen the time needed to complete the dump.

• GRSQ(CONTENTION) causes GRSQ processing to collect all ENQ resources on the local system, and only collect information about global resources in contention in the rest of the GRS complex. This is the default, which we recommend.