vSphere performance charts are very useful for monitoring the performance of the ESX data store. In a performance chart, by default, you can view the space utilization for the data store. It includes two pie charts: By File Type and By Virtual Machines (Top 5). The first pie chart (By File Type) can display the portions of space utilized by Virtual Disk, Swap Files, Snapshots, Other VM Files, Other (files), and Free Space. The other pie chart (By Virtual Machines) can display the space utilization of the top five virtual machines stored in the data store. The following charts, which are located under the vSphere Performance tab of each data store, are for your reference:

VMware vSphere performance charts have a lot of statistics metrics that can help you identify the storage or disk problem, for example, disk read/write latency, number of commands queued, number of active disk commands, and number of aborted disk commands. Disk latency is the time taken to complete...