Local Volume Performance Chart

In this article

    The Disk chart displays historical statistics on disk usage for the selected local volume.

    Local Volume Performance Chart

    The following table provides information on predefined views and counters.

    Chart View

    Counter

    Measurement Unit

    Description

    Datastore Usage

    Disk/Physical Disk: Disk Read

    MB/s

    Rate at which data is read from a volume.

    Disk/Physical Disk: Disk Write

    MB/s

    Rate at which data is written to a volume.

    Disk/Physical Disk: Disk

    MB/s

    Sum of read and write rates for a volume.

    Datastore Queue Length

    Disk/Physical Disk: Avg. Disk Queue Length

    Number

    Average number of read and write operations queued for a volume.

    Datastore IOPS

    Disk/Physical Disk: Disk Transfers/sec

    Number

    Number of read and write operations completed per second, regardless of how much data they involve.

    This counter measures disk utilization. If the value exceeds 50, it can be an indicator of a bottleneck.

    Datastore Latency

    Disk/Physical Disk: Avg Disk sec/Read

    Millisecond

    Average time that a read operation from a volume takes.

    Disk/Physical Disk: Avg Disk sec/Write

    Millisecond

    Average time that a write operation to a volume takes.