Performance Collection rules are rules written into the MP that collect performance data from performance counters. The best practice is that performance collection rules should be categorized as such in the MP.
Performance collection rules that are not explicitly categorized as PerformanceCollection will still function correctly, as in the will collect the performance data they are intended to collect. However, without the categorization, they will not display in the UI in the correct performance views, and will not be available to the end-user as a result.
Using the Authoring Console:
1. To change this for an existing rule, open the Properties dialog for that rule. Under the Options tab, ensure that Category is set to Performance Collection.
< Rule ID = " Microsoft.Windows.Server.2008.LogicalDisk.AvgDiskQueueLength.Collection" Enabled =" onStandardMonitoring" Target =" Server2008!Microsoft.Windows.Server.2008.LogicalDisk" >
< Category > PerformanceCollection </ Category >
</ Rule >