Investigating unusual performance
Zoom into the area of interest by opening the Show data for drop-down list and selecting one of the defined time spans. If necessary, use the slider controls below the chart to further refine the period. All the time series charts on this screen (inbound throughput, outbound throughput) will synchronize so that you can look for correlations in the data.
If any flat tops correspond to drops in application performance score, you likely have an issue that relates to a policy (or policies) that control the application. The policy environment may not guarantee the application sufficient bandwidth, or that less important apps, such as recreational apps, have to much bandwidth. To determine your best course of action you may need to look at the charts for other applications or application groups to see if the allowed bandwidth is appropriate.