Keeping an eye on your server’s performance is important, and DigitalOcean provides Droplet graphs with up-to-the minute visualizations of how your server is performing over time.
Droplets come with some graphs available by default. You can get additional graphs in the control panel by enabling DigitalOcean Monitoring, a free, opt-in service.
To view a Droplet’s graphs, click its name on the dashboard. You’ll arrive directly on the Graphs page:
The Droplet graphs can span 6 hours, 24 hours, 7 days, or 30 days. By default three graphs are available for any Droplet:
If you have enabled Private Networking, you’ll also have access to a fourth graph to track private network bandwidth usage. Like the Bandwidth public graph, the Bandwidth private graph will not appear until there is actual network traffic. Once there is, then the Bandwidth private chart displays the private bandwidth usage in megabits per second. Incoming bandwidth use is shown in dark purple and outgoing bandwidth in light purple.
When you mouse over any of the graphs, a line appears on all of them, pinpointing a moment in time. A graph legend appears along with readings for that specific moment. The graph below, for example, shows the the state of the system at 12:12 pm on November 21, 2016.
The default Droplet graphs are measured and calculated using external tools. They require nothing special on the Droplet itself.
You can enable graphs for other metrics, like memory and disk utilization, with DigitalOcean Monitoring. The DigitalOcean metrics agent, a small utility that runs on the Droplet, provides these additional metrics. You can automatically set up the metrics agent when you create a Droplet or after a Droplet has been created.
Once the metrics agent is enabled, you’ll have access to the additional graphs which include:
The Memory line graph displays the percentage of physical RAM in use.
The Disk Usage line graph shows the percentage of space being used on the Droplet’s disk.
Mousing over any of the line graphs will display an expanded Graphs legend, along with expanded details from the specific moment in time.
Finally, if you have enabled Private Networking and have used private bandwidth, the Graphs page will display these six charts:
An additional Load Average plot is available with the new beta metrics agent. Load average is a measure of whether the CPU is keeping up with queued processes.
There are three lines representing 1-, 5-, and 15-minute load average calculation timeframes in blue, green, and purple, respectively. You can find more details on load average in the Monitoring glossary.