Zenoss Core creates time series graphs using the RRDTool for the device and its components. "Time series" implies that we continuously measure data at regular intervals.
Devices may have graphs to display CPU utilization, load average, memory utilization, and IO. To display these graphs, navigate to a device and click on the Graphs link. See the following screenshot:
The other place we find performance graphs is at the Component level, which we've been discussing.
All performance graphs function in the same way. They can be viewed on an hourly, daily, weekly, monthly, or yearly range. The default Range is Hourly ...