During the ArcGIS Server for Administrators technical workshops at the 2013 Esri International User Conference, two demo applications were presented; Popular Extents and Services Dashboard:
This application displays statistics usage for a service, such as the number of service instances in use, average response time, and the total number of errors, warnings, and successes that are logged. The Services Dashboard can be used to more closely monitor the current state of your service and help you make more informed decisions about its use.
As promised, you can now download these apps at the link below. The zip archive contains a read me file that explains how to get the apps up and running on your web server.
You can view a recording of the ArcGIS Server for Administrators technical workshop and obtain a copy of the PowerPoint slides at the following links: