GRS Ring Systems Data for Sysplex workspace

A global resource serialization (GRS) ring consists of one or more systems connected to each other by communication links. The links are used to pass information about requests for global resources from one system to another in the complex. Requests are made by passing a message or token, called the ring system authority (RSA) message, between systems in a round-robin or ring fashion.

The GRS Ring Systems Data for Sysplex workspace enables you to monitor the condition of the ring connections, the traffic on the rings, and the rings relevant to specific z/OS systems and their activities and response times. You can use the view to understand when GRS response time is elongating or if there are disruptions on the ring. This information is important for analyzing enqueue delays in workloads.

The Response Time bar chart graphically displays the actual measured ring response time, the anticipated or average time a requestor must wait for access to a global resource, and the minimum amount of time the RSA message is delayed in each z/OS image in the GRS complex.

The Global GRS Ring Systems table view displays information about the RSA messages issued by the z/OS image and the time required to allocate a resource.

Note: If the GRS complex is not in ring mode, this workspace will display data in only two fields: GRS Mode and Ring Acceleration. In such instances, use the GRS structure information in the coupling facility workspaces.

This workspace cannot record historical data.

Related topics: Organization of the sysplex workspaces, Attribute groups used by sysplex-level predefined workspaces