You can view metrics (also called performance statistics) to understand how Flash Accel caching is increasing the performance for your storage system. This section describes the performance statistics you can view and how to customize reports so you can view the statistics for a virtual machine, a specific virtual machine disk, and a selected period of time.
Flash Accel collects metrics so that you can view system performance. You must enable performance statistics on each VM and disk that you want to monitor.
Cache metrics measure disk caching performance: average read and write latency, hit rate, insertion rate, and so on. Flash Accel rolls up caching performance statistics for disks into averages or totals for the virtual machine on which the disks are configured.