Appendix B: Windows Media Performance Counters

Windows Media Performance Monitor includes numerous performance counters that you can use to monitor the health of your streaming media system. Some counters are available for the server, some for publishing points, and some for both. The following table lists the performance counters in alphabetical order and indicates whether it is available for servers or publishing points.

Counter	Description	Server	Publishing Point
Current Cache Downloads	The number of concurrent streams being down-loaded to the memory area of the cache/proxy server.
Current Connected Players	The current number of players with unicast connections to the server. This number does not include distribution server connections.
Current Connection Queue Length	The current number of connection requests that are pending on the server from both players and distribution servers.
Current Connection Rate	The current number of clients per second that are connecting to the server.
Current File Read Rate	The current rate, in kilobits per second (Kbps), at which data packets are read from a file.
Current Incoming Bandwidth	The current bandwidth, in Kbps, allocated for streams from other servers.
Current Late Read Rate	The current number of data packets per second that take longer than 400 milliseconds to read from the file system.
Current Late Send Rate	The current number of packets that are sent out 0.5 seconds or more after the marked send time.
Current Outgoing Distribution Allocated Bandwidth	The current bandwidth, in Kbps, allocated for streams to distribution servers.
Current Outgoing Distribution Connections	The current number of distribution servers that are connected to this server.
Current Outgoing Distribution Send Rate	The current rate, in Kbps, at which data packets are being streamed to distribution servers.
Current Player Allocated Bandwidth	The current amount of bandwidth, in Kbps, that is allocated for all streams to players.
Current Player Send Rate	The current rate, in Kbps, at which data packets are being streamed to players.
Current Stream Error Rate	The current number of errors per second due to dropped packets.
Current Streaming HTTP Players	The current number of players that are being streamed data through the HTTP protocol. This does not include players that are stopped or paused.
Current Streaming MMS Players	The current number of players that are being streamed data through the MMS protocol. This does not include players that are stopped or paused.
Current Streaming Players	The current number of players that are being streamed data across all protocols. This does not include players that are stopped or paused.
Current Streaming RTSP Players	The current number of players that are being streamed data through the RTSP protocol. This does not include players that are stopped or paused.
Current UDP Resend Requests Rate	The current number of requests for UDP resends per second received from clients.
Current UDP Resends Sent Rate	The current number of UDP resends per second sent to clients.
Peak Connected Players	The peak number of players that have connected since the last time the counter was reset.
Peak Outgoing Distribution Allocated Bandwidth	The peak bandwidth, in Kbps, allocated for all streams to distribution servers that have connected since the last time the counter was reset.
Peak Outgoing Distribution Connections	The peak number of distribution servers that have connected since the last time the counter was reset.
Peak Outgoing Distribution Send Rate	The peak rate, in Kbps, at which data was streamed to distribution servers since the last time the counter was reset.
Peak Player Allocated Bandwidth	The peak bandwidth, in Kbps, that has been allocated for all streams to players since the last time the counter was reset.
Peak Player Send Rate	The peak rate, in Kbps, at which data was streamed to players since the last time the counter was reset.
Peak Streaming Players	The peak number of players that have been streamed data concurrently since the last time the counter was reset.
Total Advertisements	The total number of advertisements that have been streamed from playlists since the last time the counter was reset.
Total Connected Players	The total number of players that have connected to the server since the last time the counter was reset.
Total File Bytes Read	The total number of bytes read from files by the server since the last time the counter was reset.
Total Late Reads	The total number of times that the server required more than 400 milliseconds to read data from the file system since the last time the counter was reset.
Total Late Sends	The total number of times the server sent out data packets 0.5 seconds or more after the marked send time since the last time the counter was reset.
Total Outgoing Distribution Bytes Sent	The total number of bytes streamed to all distribution servers since the last time the counter was reset.
Total Outgoing Distribution Connections	The total number of distribution servers that have connected to the server or publishing point since the last time the counter was reset.
Total Player Bytes Sent	The total number of bytes streamed to all players since the last time the counter was reset.
Total Server Uptime	The elapsed time, in seconds, that the Windows Media Services service has been running since it was last started.
Total Stream Denials	The total number of times the server refused to send a requested stream to a client since the last time the counter was reset. This includes denials that occurred due to failure to be authorized or authenticated, as well as denials that occurred because limits were exceeded.
Total Stream Errors	The total number of stream errors due to dropped packets since the last time the counter was reset.
Total Stream Terminations	The total number of streams that were terminated due to inactivity or errors since the last time the counter was reset. This includes terminations that occurred because player inactivity and timeout limits were exceeded, as well as terminations due to events such as late reads.
Total Streaming Players	The total number of players that have been streamed data since the last time the counter was reset.
Total UDP Resend Requests	The total number of requests for UDP resends received from clients since the last time the counter was reset.
Total UDP Resends Sent	The total number of UDP resends sent to clients since the last time the counter was reset.