Performance statistics can be viewed in the XMS GUI, but can also be exported to a CSV file.
The CSV output is very handy when it comes to creating custom reports and graphs.

First login we login via putty into the XMS IP address as xmsadmin.

Now we can run the command: export-performance-history

When it completes it should display http address where you can download the CSV file. It will display 1 week data with 5 second samples.