Next, choose a collection rule. Every rule targets a specific class and collects a chunk of performance data (counter) for objects of this class.
When you choose a collection rule, make sure that it correlates with objects included in the report scope. Objects included in the report scope must belong to a class that is targeted by the rule. If the scope includes a group of objects, this group must contain objects belonging to the class that is targeted by the rule.
In our example, we need to choose a rule that collects details on the amount of free space for objects of the SQL database class.
- In the Performance Rule section, click Browse.
- In the Select rule window, open the Search By Counter tab; from the Performance object list, choose SQLSERVER : Database and click Search.
- Choose the Collect Database Total Free Space (%) rule in the list of search results and click OK.