# Dimensions for Amazon WorkSpaces Applications Metrics
<a name="dimensions-metrics"></a>

The `AWS/AppStream` namespace includes the following dimensions and dimension groups.


| Dimension | Description | 
| --- | --- | 
| Fleet | Filters the metric data by name of the Fleet. | 
| FleetName | Filters the metric data by name of the Fleet. | 
| SessionId | Filters the metric data by session identifier. | 
| InstanceId | Filters the metric data by instance identifier. | 
| UserId | Filters the metric data by user identifier. | 


| Dimension | Where Available in Amazon CloudWatch Metrics | 
| --- | --- | 
| [Fleet] | Fleet Metrics | 
| [FleetName, InstanceId] | Fleet Instance Metrics | 
| [FleetName, InstanceId, SessionId] | Fleet Session Metrics | 
| [UserId] | UserId | 
| [FleetName, InstanceId, SessionId, UserId] | FleetName, InstanceId, SessionId, UserId |