Proxmox has limited monitoring capabilities built into the GUI; however, it does lack the extensive and robust monitoring usually found in a complete monitoring solution. Proxmox comes with built-in RRD-based graphs to show the historical resource usage and performance data up to 1 year. Using this tool, we can analyze the performance trend of a resource over a period of time. All consumption and performance data are under the Summary tab menu for both Proxmox nodes and virtual machines. We can view data on a per hour, day, week, and yearly basis.
The following screenshot shows the Summary page of the Node pm4-1 with the drop-down list to select a period of data:
There are also ways to display a list of all the nodes and virtual machines in the cluster and sort them by consumption to get quick information on the highest or lowest resource consuming entity. We can see the list by navigating to Datacenter | Search. The following screenshot shows the list of Proxmox...
