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 (see the following screenshot):
Each group of graphs has a Reset button that restores all the graphs on a page to the default view. The Link graphs checkbox allows all the graphs on the page to stay synchronized as we navigate through the time line of an individual graph.
Each graph also has its own set of controls. On either side of the graph, we...