The Circles chart gives a graphical representation of the top 100 flows during the selected interval. The Time selector allows you to select the time interval for which data is to be displayed.

For the Circles charts a time interval selection is defined by a start and end time. The Time selector includes the following, commonly used, time interval selections:

The Custom option Gives full flexibility in accessing the stored historical data. Set the desired start and end times for the interval, then click the OK button to cause the chart for the selected interval to be displayed.

When a non-custom time period is selected, the displayed chart will be automatically updated when the next data point is available, thus displaying a rolling window of data.

The Time selector also includes back and forward buttons that can be used to view data for the previous or next time interval. For example if the time selection is Last 5 mins and the current time is Tue 1 Dec, 2009 11:44, clicking on the back arrow will cause the previous 5 minutes of data, ending at Tue 2 Dec 2009, 11:39, to be displayed (using the Custom time selection). The back and forward buttons will be inactive if the current time selection is at the beginning or the end of the stored data.