Discovery and Monitoring of Resources and Resource Groups

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Applies To: Operations Manager 2007

For scalability reasons, discovery and monitoring of resource groups is limited by default to a maximum of 300 resource groups. It is possible but not recommended to override this for specific clusters. An alert (Resource Group Discovery Limit Exceeded) will be generated if a cluster containing more than 300 resource groups is discovered. If you override the limit for specific clusters, CPU utilization for the Operations Manager agent will increase.

The following example for overriding the limit uses Windows Server 2008 R2 clustering, however the same override is present on all operating system versions.

To override the 300 resource group discovery limit

  1. In the Authoring section of the Operations console, expand Management Pack Objects and then click Object Discoveries.

  2. Find the Windows Server 2008 R2 Cluster Discovery.

  3. Right-click, point to Overrides, Override the Object Discovery, and click for a specific object of class: Windows Server 2008 R2 Monitoring Cluster Service.

  4. Select the specific cluster instance.

  5. Override ResourceGroupDiscoveryLimit to the desired value (default is 300).

Resource discovery and monitoring is disabled by default because the resource group monitors provide sufficient monitoring. It is not recommended to enable resource discovery and monitoring, however it is possible to do so by using the Discover Cluster Resources override on the Windows Server 2003, 2008, and 2008 R2 Cluster Discovery. By default, this has a value of false.