View vSAN Cluster Performance

You can use the vSAN cluster performance charts to monitor the workload in your cluster and determine the root cause of problems.

When the performance service is turned on, the cluster summary displays an overview of vSAN performance statistics, including vSAN IOPS, throughput, and latency. At the cluster level, you can view detailed statistical charts for virtual machine consumption and the vSAN back end.

Note: To view iSCSI performance charts, all hosts in the vSAN cluster must be running ESXi 6.5 or later.

Prerequisites

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

Procedure

Navigate to the vSAN cluster.

Click the Monitor tab.

Option	Description
vSphere Client	Under vSAN, select Performance. Select VM. Select a time range for your query. vSAN displays performance charts for clients running on the cluster, including IOPS, throughput, latency, congestions, and outstanding I/Os. The statistics on these charts are aggregated from the hosts within the cluster. Select Backend. Select a time range for your query. vSAN displays performance charts for the cluster back-end operations, including IOPS, throughput, latency, congestions, and outstanding I/Os. The statistics on these charts are aggregated from the hosts within the cluster. Select iSCSI and select an iSCSI target or LUN. Select a time range for your query. vSAN displays performance charts for iSCSI targets or LUNs, including IOPS, bandwidth, latency, and outstanding I/O.
vSphere Web Client	Click Performance. Select vSAN - Virtual Machine Consumption. Select a time range for your query. vSAN displays performance charts for clients running on the cluster, including IOPS, throughput, latency, congestions, and outstanding I/Os. The statistics on these charts are aggregated from the hosts within the cluster. Select vSAN - Backend. Select a time range for your query. vSAN displays performance charts for the cluster back-end operations, including IOPS, throughput, latency, congestions, and outstanding I/Os. The statistics on these charts are aggregated from the hosts within the cluster. Select vSAN - iSCSI and select an iSCSI target or LUN. Select a time range for your query. vSAN displays performance charts for iSCSI targets or LUNs, including IOPS, bandwidth, latency, and outstanding I/O.

Option

Description

vSphere Client

Under vSAN, select Performance.
Select VM. Select a time range for your query. vSAN displays performance charts for clients running on the cluster, including IOPS, throughput, latency, congestions, and outstanding I/Os. The statistics on these charts are aggregated from the hosts within the cluster.
Select Backend. Select a time range for your query. vSAN displays performance charts for the cluster back-end operations, including IOPS, throughput, latency, congestions, and outstanding I/Os. The statistics on these charts are aggregated from the hosts within the cluster.
Select iSCSI and select an iSCSI target or LUN. Select a time range for your query. vSAN displays performance charts for iSCSI targets or LUNs, including IOPS, bandwidth, latency, and outstanding I/O.

vSphere Web Client

Click Performance.
Select vSAN - Virtual Machine Consumption. Select a time range for your query. vSAN displays performance charts for clients running on the cluster, including IOPS, throughput, latency, congestions, and outstanding I/Os. The statistics on these charts are aggregated from the hosts within the cluster.
Select vSAN - Backend. Select a time range for your query. vSAN displays performance charts for the cluster back-end operations, including IOPS, throughput, latency, congestions, and outstanding I/Os. The statistics on these charts are aggregated from the hosts within the cluster.
Select vSAN - iSCSI and select an iSCSI target or LUN. Select a time range for your query. vSAN displays performance charts for iSCSI targets or LUNs, including IOPS, bandwidth, latency, and outstanding I/O.

Click Refresh or Show Results to update the display.