Expressions in dashboard widgets

Expressions in timeseries widgets allow you to display data based on calculations with metrics of your choosing.

In a dashboard, any timeseries widget (line, spline, area, stacked area) allows you to build expressions from metrics you choose, and show the result of those expressions in a single graph. The following examples use expressions to solve specific problems. In the first example, we want to show Read IOPS as a percentage of Total IOPS for all storage assets in our environment. The second example gives us visibility into the "system" or "overhead" IOPS that occur in our environment--those IOPS that are not from reading or writing data.