The Flow Usage window displays the contents of the Flow Monitor table as a treemap. The tiles on the treemap are coloured according to the network protocol used by the underlying flow.
The area occupied by each tile is proportional to the value of the selected property for the flow.
The treemap is updated each time the Flow Monitor updates its table. Any flows that have been filtered out by Flow Monitor will not be shown on the treemap.
The image below shows a treemap displaying bandwidth usage.
Flow Detail can be inspected by clicking on the tiles that make up the treemap.
The first click on a tile, will highlight that tile and remove any highlighting from a previously selected tile. If the popover window was previously detached, it is updated with the details of the new selection.
If you again click the (now highlighted) tile, and the popover had not been previously detached, you will see a new popover (which can be detached) showing the flow details.
Toolbar
The toolbar has a control for selecting the flow property to be displayed by the treemap. It may take several seconds for the treemap to update (determined by the update interval of the Flow Monitor) after selecting a different property.
The text display in the tool bar shows the sum of the value of the displayed property across all flows displayed in the map.
Treemap
The treemap colours the tiles according to the protocol/port colours defined in the Map Window Settings panel.
If the Map Window is not open, then the fallback is to use the following colours.