# Viewing Performance Information

The Performance option displays an overview of the average and peak throughput and link utilization of the SAN components. The Filter drop-down list at the top-right of the screen allows you to filter the data based on various time periods.

In a large scale environment, we recommend that you select only select only "Trunks" and not the "Access or Errors and Discards" option during Performance Collections operations. This will ensure optimal performance monitored and managed entities in DCNM and allow successful Performance collection.

All performance pages allows you to print the page and export to Excel, By default, the Export To Excel icon is the export traffic number in raw digit format. You can export the same unit number for the traffic data, such as GB/Gb/MB/Mb/KB/Kb/B/b, For example; If you want to display the traffic numbers in GB, you need to modify the server.properties fileto set export.unitless=false and export.unit=GB.

If you set export.unitless=false, and do not enter a value for the export.unit, it will display the default Web Client unit value.

Note You do not have to restart the DCNM server.

The Performance menu contains the following submenus:

• Switch—Shows the CPU, memory and traffic information.

• End Devices—Shows a detailed list of end devices (host or storage), port traffic and errors.

• ISLs—Shows a detailed list of ISL traffic and errors.

• NPV Links— Shows a detailed list of traffic between NPV devices and ports.

• Flows—Shows a detailed list of host-to-storage traffic.

• Ethernet—Shows a detailed list of Ethernet interfaces.

• Others—Shows a detailed list of other statistics.

• Virtual Port Channels—Shows a list of vPC utilization.

• N3K Buffer Usage - Displays performance of the N3K buffer usage and the total number of bursts during a specific time.