Performance issues usually begin with the scene of an administrator looking at statistics, scratching the back of the head and saying ‘Wait, what?’
The issue can manifest itself in so many ways and the main struggle is to find the entities of the environment that experience issues at the same time and look at the environment layer by layer. Whether the bottleneck lies on the network, compute or storage layer, troubleshooting performance issue is always a tedious and time-consuming task.
That is why Nutanix published an article (or two) to help you with the process. Where to look, what to look for and how to interpret the numbers.