Monitor the performance of virtual machines, hosts, and the vSAN datastore to identify potential storage problems.
Monitor regularly the following performance indicators to identify faults in vSAN storage, for example, by using the performance charts in the vSphere Web Client:
Datastore. Rate of I/O operations on the aggregated datastore.
Virtual Machine. I/O operations, memory and CPU usage, network throughput and bandwidth.
You can use the vSAN performance service to access detailed performance charts. For information about using the performance service, see Monitoring vSAN Performance. For more information about using performance data in a vSAN cluster, see the vSAN Troubleshooting Reference Manual.