# Instance and Session Performance Metrics for Single-session and Multi-session Fleets
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The following are instance and session performance metrics for single-session and multi-session fleets.


| Metric | Description | Dimensions | Statistics | Units | 
| --- | --- | --- | --- | --- | 
| CpuUtilizationInstance |  The percentage of allocated compute units that are currently in use on the instance.  |  [Fleet] [UserId] [FleetName, InstanceId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Percent | 
| MemoryUtilizationInstance |  The percentage of allocated physical memory units that are currently in use on the instance.  |  [Fleet] [UserId] [FleetName, InstanceId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Percent | 
|  PagingFileUtilizationInstance  |  The percentage of the paging file that is currently in use to extend the Memory (RAM) capacity.  |  [Fleet] [UserId] [FleetName, InstanceId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Percent | 
|  DiskUtilizationInstance  |  The percentage of disk units that are currently in use to run programs and carry out tasks on the instance.  |  [Fleet] [UserId] [FleetName, InstanceId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Percent | 
| CpuUtilizationSession |  The percentage of allocated compute units that are currently in use by the session.  |  [Fleet] [UserId] [FleetName, InstanceId, SessionId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Percent | 
|  MemoryUtilizationSession  |  The percentage of allocated physical memory units that are currently in use by the session.  |  [Fleet] [UserId] [FleetName, InstanceId, SessionId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Percent | 
| DiskReadOperations |  Amount of disk reads per instance  |  [Fleet] [UserId] [FleetName, InstanceId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Count | 
| DiskWriteOperations |  Amount of disk write per instance  |  [Fleet] [UserId] [FleetName, InstanceId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Count | 
| InSessionLatency |  Round trip time between WorkSpaces Application server and client measured at p90  |  [Fleet] [UserId] [FleetName, InstanceId, SessionId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Milliseconds | 
| FramesPerSecond |  Frames per second for the specific session  |  [Fleet] [UserId] [FleetName, InstanceId, SessionId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Count | 
| Bandwidth |  Amount of data transferred between WorkSpaces Applications service and Client during the session.  |  [Fleet] [UserId] [FleetName, InstanceId, SessionId] [FleetName, InstanceId, SessionId, UserId]  | Average, Minimum, Maximum | Kilobits/Second |