# Utilization Group

The utilization group provides visual representation of a fabric's performance in terms of bandwidth and packet rate. Each metric is summarized by the following:

Trend Chart | The historical values measured by all devices and all switches in a fabric, showing the trend and how switches contribute to the metric. The value represents the aggregated metric on all data traffic types: internal, send and transmit.
Top N Chart | The CURRENT top N worst ports measured by the selected metric. The parameter N can be changed with the Setup Wizard, or in this chart.
Histogram Chart | The CURRENT value distribution against ports, i.e., how many ports fall in a value range.

The combination of these charts provides mixed insights about the history, the present, and the global and local performance over the ports. On the bottom of the charts panel are the trend thumbnails of available metrics.

To bring the metric to the front, click on a thumbnail . To switch between the Top N and Histogram charts, use the drop-down menu on the title bar.