You can use the Virtual SAN host performance charts to monitor the workload on your hosts and determine the root cause of problems. You can view Virtual SAN performance charts for hosts, disk groups, and individual storage devices.

Before you begin

The Virtual SAN performance service must be turned on before you can view performance charts.

About this task

When the performance service is turned on, the host summary displays performance statistics for each host and its attached disks. At the host level, you can view detailed statistical charts for virtual machine consumption and the Virtual SAN back end, including IOPS, throughput, latency, and congestion. At the disk group level, you can view statistics for the disk group. At the disk level, you can view statistics for an individual storage device.

Procedure

  1. Navigate to the Virtual SAN cluster in the vSphere Web Client Navigator, and select a host.
  2. Click the Monitor tab and click Performance.
  3. Select Virtual SAN - Virtual Machine Consumption. Select a time range for your query.

    Virtual SAN displays performance charts for clients running on the host, including IOPS, throughput, latency, congestions, and outstanding I/Os.

  4. Select Virtual SAN - Backend. Select a time range for your query.

    Virtual SAN displays performance charts for the host back-end operations, including IOPS, throughput, latency, congestions, and outstanding I/Os.

  5. Select Virtual SAN - Disk Group, and select a disk group. Select a time range for your query.

    Virtual SAN displays performance charts for the disk group, including front end (Guest) IOPS, throughput, and latency, as well as overhead IOPS and latency. It also displays the read-cached hit rate, evictions, write-buffer free percentage, capacity and usage, cache disk destage rate, congestions, outstanding I/O, outstanding I/O size, delayed I/O percentage, delayed I/O average latency, internal queue IOPS, and internal queue throughput.

  6. Select Virtual SAN - Disk, and select a disk. Select a time range for your query.

    Virtual SAN displays performance charts for the disk, including a physical/firmware layer IOPS, throughput, and latency.