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vSAN Performance Graphs in the vSphere Web Client (2144493)

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Purpose

This article explains vSAN Performance Graphs, available in vSAN (formerly known as Virtual SAN) 6.2 and later.

Resolution

To get vSAN performance graphs/charts, first you need to enable the vSAN performance service.

You can view performance changes from different levels of entities (clusters, hosts, disk groups, physical disks, virtual machines and virtual disks) and different standpoints (Virtual Machine consumption, vSAN backend).

There are multiple graphs you can monitor to understand vSAN performance. Here are the details of all available vSAN performance graphs.
 
Note: * denotes vSAN 6.6 and later only.
 

Cluster performance

Virtual Machine Consumption graphs

These graphs show cluster metrics from the perspective of virtual machine consumption.

IOPS

This graph shows I/O operations per second (IOPS) consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.

             
Metrics Metrics Description
Read IOPS Read IOPS consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
Write IOPS Write IOPS consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.

Throughput

This graph shows throughput consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
             
Metrics Metrics Description
Read Throughput Read throughput consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
Write Throughput Write throughput consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.

Latency

This graph shows average latency of I/Os generated by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
             
Metrics Metrics Description
Read Latency Average read latency of I/Os generated by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
Write Latency Average write latency of I/Os generated by all vSAN clients in the cluster, such as virtual machines, stats object, etc.

Congestions

This graph shows congestions of I/Os generated by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
         
Metrics Metrics Description
Congestions Congestions of I/Os generated by all vSAN clients in the cluster, such as virtual machines, stats object, etc.

Outstanding IO

This graph shows vSAN cluster backend outstanding I/O.
         
Metrics Metrics Description
Outstanding IO Outstanding I/O from all vSAN clients in the cluster, such as virtual machines, stats object, etc.

vSAN Backend graphs

These graphs show cluster metrics from the perspective of the vSAN backend.

IOPS

This graph shows vSAN cluster backend IOPS.
              
Metrics Metrics Description
Read IOPS vSAN cluster read IOPS for the vSAN backend.
Write IOPS vSAN cluster write IOPS for the vSAN backend.
Recovery Write IOPS vSAN cluster recovery write IOPS for the vSAN backend.
Resync Read IOPS* vSAN cluster read IOPS of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.

Throughput

This graph shows vSAN cluster backend throughput.
                 
Metrics Metrics Description
Read Throughput vSAN cluster read throughput for the vSAN backend.
Write Throughput vSAN cluster write throughput for the vSAN backend.
Recovery Write Throughput vSAN cluster recovery write throughput for the vSAN backend.
Resync Read Throughput* vSAN cluster read throughput of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.

Latency

This graph shows vSAN cluster backend latency.
                 
Metrics Metrics Description
Read Latency vSAN cluster average read latency for the vSAN backend.
Write Latency vSAN cluster average write latency for the vSAN backend.
Recovery Write Latency vSAN cluster recovery write average latency for the vSAN backend.
Resync Read Latency* vSAN cluster read Latency of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.

Congestions

This graph shows vSAN cluster backend congestions.
         
Metrics Metrics Description
Congestions vSAN cluster congestions for the vSAN backend.

Outstanding IO

This graph shows vSAN cluster backend outstanding I/O.

Metrics Metrics Description
Outstanding IO
vSAN cluster outstanding I/O for the vSAN backend.

Host Performance

Virtual Machine Consumption graphs

These graphs show host metrics from the perspective of Virtual Machine consumption.

IOPS

This graph shows IOPS consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.

Metrics Metrics Description
Read IOPS Read IOPS consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
Write IOPS Write IOPS consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
Resync Read IOPS* vSAN host read IOPS of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.

Throughput

This graph shows throughput consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
             
Metrics Metrics Description
Read Throughput Read throughput consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
Write Throughput Write throughput consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
Resync Read Throughput* vSAN host read throughput of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.

Latency

This graph shows average latency of I/Os generated by all vSAN clients in the host, such as virtual machines, stats object, etc.
             
Metrics Metrics Description
Read Latency Average read latency of I/Os generated by all vSAN clients in the host, such as virtual machines, stats object, etc.
Write Latency Average write latency of I/Os generated by all vSAN clients in the host, such as virtual machines, stats object, etc.
Resync Read Latency* vSAN host read Latency of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.

Congestions

This graph shows congestions of I/Os generated by all vSAN clients in the host, such as virtual machines, stats object, etc.
         
Metrics Metrics Description
Congestions Congestions of I/Os generated by all vSAN clients in the host, such as virtual machines, stats object, etc.

Outstanding IO

This graph shows outstanding I/O from all vSAN clients in the host, such as virtual machines, stats object, etc.
         
Metrics Metrics Description
Outstanding IO Outstanding I/O from all vSAN clients in the host, such as virtual machines, stats object, etc.

Local Client Cache Hit IOPS

This graph shows the average local client cache read IOPS. It is available in vSAN 6.5 and later releases.
         
Metrics Metrics Description
Local Client Cache Hit IOPS
Average local client cache read IOPS.

Local Client Cache Hit Rate

This graph shows the percentage of read I/Os which could be satisfied by the local client cache. It is available in vSAN 6.5 and later releases.
         
Metrics Metrics Description
Local Client Cache Hit Rate
Percentage of read I/Os which could be satisfied by the local client cache.

vSAN Backend graphs

These graphs show metrics about hosts from the perspective of the vSAN backend.

IOPS

This graph shows vSAN backend host IOPS.


Metrics Metrics Description
Read IOPS vSAN host read IOPS for the vSAN backend.

Write IOPS

vSAN host write IOPS for the vSAN backend.

Throughput

This graph shows vSAN backend host throughput.
             
Metrics Metrics Description
Read Throughput vSAN host read throughput for the vSAN backend.
Write Throughput vSAN host write throughput for the vSAN backend.

Latency

This graph shows vSAN backend host latency.
             
Metrics Metrics Description
Read Latency vSAN host read I/O average latency for the vSAN backend.
Write Latency vSAN host write I/O average latency for the vSAN backend.

Resync IOPS

This graph shows vSAN backend host resynchronization IOPS.
         
Metrics Metrics Description
Recovery Write IOPS vSAN host recovery write IOPS for the vSAN backend.

Resync Throughput

This graph shows vSAN backend host resynchronization throughput.
         
Metrics Metrics Description
Recovery Write Throughput vSAN host recovery write throughput for the vSAN backend.

Resync Latency

This graph shows vSAN backend host resynchronization latency.
         
Metrics Metrics Description
Recovery Write Latency vSAN host recovery write I/O average latency for the vSAN backend.

Congestions

This graph shows vSAN backend host congestions.
         
Metrics Metrics Description
Congestions vSAN host congestions for the vSAN backend.

Outstanding IO

This graph shows vSAN backend host outstanding I/O.

Metrics Metrics Description
Outstanding IO vSAN host outstanding I/O for the vSAN backend.
  
 

Network Consumption graphs

Note:These Network Consumption graphs are available in vSAN 6.6 and later.
 
Physical NIC network status graphs
These graphs metrics about Physical Nic network status.
 
pNIC Throughput
This graph shows Physical NIC Network I/O Throughput.
Metrics 
Metrics Description
pNIC Throughput Inbound
Physical NIC Throughput Inbound.
pNIC Throughput Outbound
Physical NIC Throughput Outbound.

pNIC Packets Per Second
This graph shows Physical NIC Packets Per Second.
Metrics 
Metrics Description
pNIC Inbound Packets Per Second 
Physical NIC Inbound Packets Per Second.
pNIC Outbound Packets Per Second
Physical NIC Outbound Packets Per Second.

 
 pNIC Packets Loss Rate
This graph shows Percentage of Physical NIC Packets Loss Rate.
 
Metrics 
Metrics Description
pNIC Inbound Packets Loss Rate 
Percentage of Physical NIC Inbound Packets Loss Rate.
pNIC Outbound Packets Loss Rate 
Percentage of Physical NIC Outbound Packets Loss Rate.
 
 
VMKernel Network Adapter status graphs
These graphs metrics about VMKernel Network Adapter status graphs.
 
VMKernel Network Adapter Throughput
This graph shows VMkernel Network Adapter Network I/O Throughput.
 
Metrics 
Metrics Description
Throughput Inbound
VMkernel Network Adapter Throughput Inbound.
Throughput Outbound 
VMkernel Network Adapter Throughput Outbound.
 
VMKernel Network Adapter Packets Per Second
This graph shows VMkernel Network Adapter Packets Per Second.
 
Metrics 
Metrics Description
Inbound Packets Per Second 
VMkernel Network Adapter Inbound Packets Per Second.
Outbound Packets Per Second 
VMkernel Network Adapter Outbound Packets Per Second.
 
VMKernel Network Adapter Packets Loss Rate
This graph shows Percentage of VMkernel Network Adapter Packets Loss Rate.
 
Metrics 
Metrics Description
Inbound Packets Loss Rate 
Percentage of VMkernel Network Adapter Packets Loss Rate.
Outbound Packets Loss Rate 
Percentage of VMkernel Network Adapter Packets Loss Rate.
 
vSAN Host Network status graphs
These graphs metrics about vSAN Host Network status graphs.
 
vSAN Host Network Throughput
This graph shows vSAN Host Network I/O Throughput.
 
Metrics 
Metrics Description
Network Inbound Throughput 
Host Throughput Inbound of All VMKernel Network Adapters Enabled vSAN Traffic.
Network Outbound Throughput  
Host Throughput Outbound of All VMKernel Network Adapters Enabled vSAN Traffic.
 
vSAN Host Network Packets Per Second
This graph shows vSAN Host Packets Per Second.
 
Metrics 
Metrics Description
Network Inbound Packets Per Second 
Host Network Inbound Packets Per Second of All VMKernel Network Adapters Enabled vSAN Traffic.
Network Outbound Packets Per Second 
Host Network Outbound Packets Per Second of All VMKernel Network Adapters Enabled vSAN Traffic.
 
vSAN Host Network Packets Loss Rate
This graph shows Percentage of Host Packets Loss Rate.
 
Metrics 
Metrics Description
Network Inbound Packets Loss Rate 
Percentage of Host Inbound Packets Loss Rate of All VMKernal Network Adapters Enabled vSAN Traffic.
Network Outbound Packets Loss Rate 
Percentage of Host Outbound Packets Loss Rate of All VMKernal Network Adapters Enabled vSAN Traffic.
 

vSAN Disk Group Performance

Disk Group graphs

These graphs show metrics about disk groups.

Frontend (Guest) IOPS

This graph shows vSAN disk group (cache tier disk) frontend (guest) IOPS.
                  
Metrics Metrics Description
Frontend Read IOPS vSAN disk group (cache tier disk) frontend read IOPS, including RC read misses.
Frontend Write IOPS vSAN disk group (cache tier disk) frontend write IOPS.
Read Cache Read IOPS vSAN disk group (cache tier disk) Read Cache read IOPS.
Write Buffer Write IOPS vSAN disk group (cache tier disk) Write Buffer write IOPS.

Frontend (Guest) Throughput

This graph shows vSAN disk group (cache tier disk) frontend (guest) throughput.
             
Metrics Metrics Description
Frontend Read Throughput vSAN disk group (cache tier disk) frontend read throughput.
Frontend Write Throughput vSAN disk group (cache tier disk) frontend write throughput.

Frontend (Guest) Latency

This graph shows vSAN disk group (cache tier disk) frontend (guest) latency.
                     
Metrics Metrics Description
Frontend Read Latency vSAN disk group (cache tier disk) frontend read latency.
Frontend Write Latency vSAN disk group (cache tier disk) frontend write latency.
Read Cache Read Latency vSAN disk group (cache tier disk) Read Cache read latency.
Write Buffer Write Latency vSAN disk group (cache tier disk) Write Buffer write latency.

 Overhead IOPS

This graph shows vSAN disk group (cache tier disk) overhead IOPS.
             
Metrics Metrics Description
Read Cache Write IOPS vSAN disk group (cache tier disk) Read Cache write IOPS.
Write Buffer Read IOPS vSAN disk group (cache tier disk) Write Buffer read IOPS.

Overhead IO Latency

This graph shows vSAN disk group (cache tier disk) overhead I/O latency.
             
Metrics Metrics Description
Read Cache Write Latency vSAN disk group (cache tier disk) Read Cache write latency.
Write Buffer Read Latency vSAN disk group (cache tier disk) Write Buffer read latency.

Read Cache Hit Rate

This graph shows vSAN disk group (cache tier disk) Read Cache hit rate.
         
Metrics Metrics Description
Read Cache Hit Rate vSAN disk group (cache tier disk) Read Cache hit rate.

Evictions

This graph shows vSAN disk group (cache tier disk) evictions.
             
Metrics Metrics Description
Cache Invalidations Cache lines invalidated due to overwrites.
Evictions Evictions due to Read Cache contention.

Write Buffer Free Percentage

This graph shows vSAN disk group (cache tier disk) Write Buffer free percentage.
         
Metrics Metrics Description
Write Buffer Free Percentage vSAN disk group (cache tier disk) Write Buffer free percentage.

Capacity and Usage

This graph shows vSAN disk group capacity and usage.
                         
Metrics Metrics Description
Capacity vSAN disk group capacity.
Used Capacity vSAN disk group used capacity.
Reserved Capacity vSAN disk group reserved capacity.
Read Cache Size vSAN disk group Read Cache size.
Write Buffer Size vSAN disk group Write Buffer size.

Cache Disk De-stage Rate

This graph shows the throughput of the data destaging from the cache disk to capacity disks.
             
Metrics Metrics Description
Bytes De-stage from SSD The throughput of the SSD bytes destaged from the cache disk to capacity disks.
Zero-Bytes De-stage The throughput of the zero-bytes destaged to capacity disks.

Congestions

This graph shows vSAN disk group congestions.
                             
Metrics Metrics Description
Mem-Congestion vSAN disk group Mem-congestions.
Slab-Congestion vSAN disk group Slab-congestions.
SSD-Congestion vSAN disk group SSD-congestions.
IOPS-Congestion vSAN disk group IOPS-congestions.
Log-Congestion vSAN disk group Log-congestions.
Comp-Congestion vSAN disk group Comp-congestion.

Outstanding IO

This graph shows the outstanding write I/O of disk groups.
             
Metrics Metrics Description
Outstanding Write OPs The number of outstanding write operations of the disk group.
Outstanding Recovery Write OPs The number of outstanding recovery write operations of the disk group.

Outstanding IO Size

This graph shows the outstanding write I/O size of disk groups.
             
Metrics Metrics Description
Outstanding Write IO Size The size of outstanding write I/O of the disk group.
Outstanding Recovery Write IO Size The size of outstanding recovery write I/O of the disk group.

Delayed IO Percentage

This graph shows the percentage of I/Os that pass through vSAN internal queues.
         
Metrics Metrics Description
Delayed IO Percentage The percentage of I/Os which pass through vSAN internal queues.

Delayed IO Average Latency

This graph shows the average latency of I/Os that pass through vSAN internal queues.
                         
Metrics Metrics Description
Delayed IO Average Latency The average latency of total I/Os that pass through vSAN internal queues.
Latency of Namespace Queue The latency of the namespace I/O queue in the vSAN internal scheduler.
Latency of Recovery Queue The latency of the recovery I/O queue in the vSAN internal scheduler.
Latency of VM Queue The latency of the Virtual Machine I/O queue in the vSAN internal scheduler.
Latency of Meta Queue The latency of the meta I/O queue in the vSAN internal scheduler.

Internal Queue IOPS

This graph shows the IOPS of delayed I/Os that pass through vSAN internal queues.
                         
Metrics Metrics Description
Total Queue IOPS The IOPS of total I/Os that pass through vSAN internal queues.
IOPS of Namespace Queue The IOPS of the namespace I/O queue in the vSAN internal scheduler.
IOPS of Recovery Queue The IOPS of the recovery I/O queue in the vSAN internal scheduler.
IOPS of Virtual Machine Queue The IOPS of the Virtual Machine I/O queue in the vSAN internal scheduler.
IOPS of Meta Queue The IOPS of the meta I/O queue in the vSAN internal scheduler.

Internal Queue Throughput

This graph shows the throughput of delayed I/Os that pass through vSAN internal queues.

Metrics Metrics Description
Total Queue Throughput The throughput of total delayed I/O in the vSAN internal scheduler.
Throughput of Namespace Queue The throughput of the namespace I/O queue in the vSAN internal scheduler.
Throughput of Recovery Queue The throughput of the recovery I/O queue in the vSAN internal scheduler.
Throughput of V M Queue The throughput of the Virtual Machine I/O queue in the vSAN internal scheduler.
Throughput of Meta Queue The throughput of the meta I/O queue in the vSAN internal scheduler.
 

vSAN Disk Group performance graphs

Note: These vSAN Disk group performance graphs are available in vSAN 6.6 and later.
 
Resync Traffic Throughput
This graph shows vSAN disk group level throughput of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects.
Metrics Metrics Description
Policy Change Read vSAN disk group level read IOPS for resync traffic caused by change of policy.
Evacuation Read vSAN disk group level read IOPS for resync traffic caused by maintenance mode and object evacuation.
Rebalance Read vSAN disk group level read IOPS for resync traffic caused by rebalancing objects.
Repair Read vSAN disk group level read IOPS for resync traffic caused by object repair.
Policy Change Write vSAN disk group level write IOPS for resync traffic caused by change of policy.
Evacuation Write vSAN disk group level write IOPS for resync traffic caused by maintenance mode and object evacuation.
Rebalance Write vSAN disk group level write IOPS for resync traffic caused by rebalancing objects.
Repair Write vSAN disk group level write IOPS for resync traffic caused by object repair.
 
 
Resync Traffic latency
This graph shows vSAN disk group level average latency of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects.
Metrics Metrics Description
Policy Change Read vSAN disk group level read average latency for resync traffic caused by change of policy.
Evacuation Read vSAN disk group level read average latency for resync traffic caused by maintenance mode and object evacuation.
Rebalance Read vSAN disk group level read average latency for resync traffic caused by rebalancing objects.
Repair Read vSAN disk group level read average latency for resync traffic caused by object repair.
Policy Change Write vSAN disk group level write average latency for resync traffic caused by change of policy.
Evacuation Write vSAN disk group level write average latency for resync traffic caused by maintenance mode and object evacuation.
Rebalance Write vSAN disk group level write average latency for resync traffic caused by rebalancing objects.
Repair Write vSAN disk group level write average latency for resync traffic caused by object repair.
 
Resync Traffic latency
This graph shows vSAN disk group level average latency of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects.
Metrics Metrics Description
Policy Change Read vSAN disk group level read average latency for resync traffic caused by change of policy.
Evacuation Read vSAN disk group level read average latency for resync traffic caused by maintenance mode and object evacuation.
Rebalance Read vSAN disk group level read average latency for resync traffic caused by rebalancing objects.
Repair Read vSAN disk group level read average latency for resync traffic caused by object repair.
Policy Change Write vSAN disk group level write average latency for resync traffic caused by change of policy.
Evacuation Write vSAN disk group level write average latency for resync traffic caused by maintenance mode and object evacuation.
Rebalance Write vSAN disk group level write average latency for resync traffic caused by rebalancing objects.
Repair Write vSAN disk group level write average latency for resync traffic caused by object repair.
 
 

vSAN iSCSI Target Performance

These graphs are all related to vSAN iSCSI service. They are available in vSAN 6.6 and later releases. All iSCSI stats are only valid when the iSCSI service is enabled.
Note:  These graphs available in vSAN 6.6 and later only.

vSAN iSCSI host level graphs

vSAN iSCSI host IOPS

This graph shows the vSAN iSCSI host level I/O operation per second (IOPS) statistics.
 
Metrics Metrics Description
Write IOPS This graph shows read I/O operations per second (IOPS) consumed by all vSAN iSCSI targets on this host.
Write IOPS This graph shows write I/O operations per second (IOPS) consumed by all vSAN iSCSI targets on this host.
Total IOPS This graph shows total I/O operations per second (IOPS) consumed by all vSAN iSCSI targets on this host.
 
vSAN iSCSI host Bandwidth

This graph shows the vSAN iSCSI host level bandwidth statistics.
 
Metrics Metrics Description
Read Bandwidth This graph shows read bandwidth consumed by all vSAN iSCSI targets on this host.
Write Bandwidth This graph shows write bandwidth consumed by all vSAN iSCSI targets on this host.
Total Bandwidth This graph shows total bandwidth consumed by all vSAN iSCSI targets on this host.
 
vSAN iSCSI host Latency

This graph shows the vSAN iSCSI host level latency statistics.
 
Metrics Metrics Description
Read Latency This graph shows read Latency consumed by all vSAN iSCSI targets on this host.
Write Latency This graph shows write Latency consumed by all vSAN iSCSI targets on this host.
Total Latency This graph shows total Latency consumed by all vSAN iSCSI targets on this host.
 
vSAN iSCSI host Outstanding IO

This graph shows the vSAN iSCSI host level Outstanding IO counts.
 
Metrics Metrics Description
Outstanding IO This graph shows outstanding IO accumulated by all vSAN iSCSI targets on this host.

 
vSAN iSCSI target level graphs

vSAN iSCSI target IOPS

This graph shows the vSAN iSCSI target level I/O operation per second (IOPS) statistics.
 
Metrics Metrics Description
Read IOPS This graph shows read I/O operations per second (IOPS) consumed by all vSAN iSCSI LUNs on this target.
Write IOPS This graph shows write I/O operations per second (IOPS) consumed by all vSAN iSCSI LUNs on this target.
Total IOPS This graph shows total I/O operations per second (IOPS) consumed by all vSAN iSCSI LUNs on this target.
 
vSAN iSCSI target Bandwidth

This graph shows the vSAN iSCSI target level bandwidth statistics.
 
Metrics Metrics Description
Read Bandwidth This graph shows read bandwidth consumed by all vSAN iSCSI LUNs on this target.
Write Bandwidth This graph shows read bandwidth consumed by all vSAN iSCSI LUNs on this target.
Total Bandwidth This graph shows total bandwidth consumed by all vSAN iSCSI LUNs on this target.
 
vSAN iSCSI target Latency

This graph shows the vSAN iSCSI target level latency statistics.
 
Metrics Metrics Description
Read Latency This graph shows read Latency consumed by all vSAN iSCSI LUNs on this target.
Write Latency This graph shows write Latency consumed by all vSAN iSCSI LUNs on this target.
Total Latency This graph shows total Latency consumed by all vSAN iSCSI LUNs on this target.
 
vSAN iSCSI target Outstanding IO

This graph shows the vSAN iSCSI target level Outstanding IO counts.
 
Metrics Metrics Description
Outstanding IO This graph shows outstanding IO accumulated by all vSAN iSCSI LUNs on this target.

 
vSAN iSCSI LUN level graphs

 
vSAN iSCSI LUN IOPS

This graph shows the vSAN iSCSI LUN level I/O operation per second (IOPS) statistics.
 
Metrics Metrics Description
Read IOPS This graph shows read I/O operations per second (IOPS) consumed by this LUN.
Write IOPS This graph shows write I/O operations per second (IOPS) consumed by this LUN.
Total IOPS This graph shows total I/O operations per second (IOPS) consumed by this LUN.
 
vSAN iSCSI LUN Bandwidth

This graph shows the vSAN iSCSI LUN level bandwidth statistics.
 
Metrics Metrics Description
Read Bandwidth This graph shows read bandwidth consumed by this LUN.
Write Bandwidth This graph shows read bandwidth consumed by this LUN.
Total Bandwidth This graph shows total bandwidth consumed by this LUN.
 
vSAN iSCSI LUN Latency
 
This graph shows the vSAN iSCSI LUN level latency statistics.
 
Metrics Metrics Description
Read Latency This graph shows read Latency consumed by this LUN.
Write Latency This graph shows write Latency consumed by this LUN.
Total Latency This graph shows total Latency consumed by this LUN.
 
This graph shows the vSAN iSCSI target level latency statistics.
 
Metrics Metrics Description
Read Latency This graph shows read Latency consumed by all vSAN iSCSI LUNs on this target.
Write Latency This graph shows write Latency consumed by all vSAN iSCSI LUNs on this target.
Total Latency This graph shows total Latency consumed by all vSAN iSCSI LUNs on this target.
 
vSAN iSCSI LUN Outstanding IO

This graph shows the vSAN iSCSI LUN level Outstanding IO counts.
 
Metrics Metrics Description
Outstanding IO This graph shows outstanding IO accumulated by this LUN.

vSAN Physical Disks Performance

Cache-tier Disk graphs

These graphs show metrics about cache-tier SSDs.

Physical/Firmware Layer IOPS

This graph shows vSAN cache tier disk physical/firmware layer IOPS.

Metrics Metrics Description
Physcial-layer Read IOPS vSAN disk physical/firmware layer read IOPS.
Physcial-layer Write IOPS vSAN disk physical/firmware layer write IOPS.

Physical/Firmware Layer Throughput

This graph shows vSAN cache tier disk physical/firmware layer throughput.
             
Metrics Metrics Description
Physcial-layer Read Throughput vSAN disk physical/firmware layer read throughput.
Physcial-layer Write Throughput vSAN disk physical/firmware layer write throughput.

Physical/Firmware Layer Latency

This graph shows vSAN cache tier disk physical/firmware layer latency.

Metrics Metrics Description
Physcial-layer Read Latency vSAN disk physical/firmware layer read latency.
Physcial-layer Write Latency vSAN disk physical/firmware layer write latency.
Guest Average Latency vSAN disk Guest I/O latency (total latency).
Device Average Latency vSAN disk I/O device latency (from HBA to backend storage).

Capacity-tier Disks graphs

These graphs show metrics about capacity-tier disks.

Physical/Firmware Layer IOPS

This graph shows vSAN capacity tier disk physical/firmware layer IOPS.
           
Metrics Metrics Description
Physcial-layer Read IOPS vSAN disk physical/firmware layer read IOPS.
Physcial-layer Write IOPS vSAN disk physical/firmware layer write IOPS.

Physical/Firmware Layer Throughput

This graph shows vSAN capacity tier disk physical/firmware layer throughput.
             
Metrics Metrics Description
Physcial-layer Read Throughput vSAN disk physical/firmware layer read throughput.
Physcial-layer Write Throughput vSAN disk physical/firmware layer write throughput.

Physical/Firmware Layer Latency

This graph shows vSAN capacity tier disk physical/firmware layer latency.
                     
Metrics Metrics Description
Physcial-layer Read Latency vSAN disk physical/firmware layer read latency.
Physcial-layer Write Latency vSAN disk physical/firmware layer write latency.
GAVG vSAN disk Guest I/O latency (total latency).
DAVG vSAN disk I/O device latency (from HBA to backend storage).

vSAN Layer IOPS

This graph shows capacity tier disk vSAN layer IOPS.
             
Metrics Metrics Description
vSAN Layer Read IOPS Disk vSAN layer read IOPS.
vSAN Layer Write IOPS Disk vSAN layer write IOPS.

vSAN Layer Latency

This graph shows capacity tier disk vSAN layer latency.

Metrics Metrics Description
vSAN Layer Read Latency Disk vSAN layer read latency.
vSAN Layer Write Latency Disk vSAN layer write latency.

Virtual Machine Performance

Virtual Machine Consumption graphs

These graphs show virtual machine metrics.

IOPS

This graph shows Virtual machine IOPS.

Metrics Metrics Description
Read IOPS Virtual machine read IOPS.
Write IOPS Virtual machine write IOPS.

Throughput

This graph shows Virtual machine throughput.
             
Metrics Metrics Description
Read Throughput Virtual machine read throughput.
Write Throughput Virtual machine write throughput.

Latency

This graph shows Virtual machine latency.

Metrics Metrics Description
Read Latency Virtual machine read latency.
Write Latency Virtual machine write latency.

Virtual Disk Performance

Virtual disk graphs

These graphs show metrics for virtual disks of virtual machines.

Virtual SCSI IOPS

This graph shows virtual machine VSCSI IOPS.

Metrics Metrics Description
Read IOPS Virtual machine VSCSI read IOPS.
Write IOPS Virtual machine VSCSI write IOPS.

Virtual SCSI Throughput

This graph shows virtual machine VSCSI throughput.
             
Metrics Metrics Description
Read Throughput Virtual machine VSCSI read throughput.
Write Throughput Virtual machine VSCSI write throughput.

Virtual SCSI Latency

This graph shows Virtual machine VSCSI latency.

Metrics Metrics Description
Read Latency
Virtual machine VSCSI read latency.
Write Latency Virtual machine VSCSI write latency.

Virtual Disk IOPS Limit graphs

These graphs show virtual disk IOPS limit metrics.

IOPS and IOPS Limit

This graph shows normalized IOPS for a virtual disk. If an IOPS limit has been specified in the storage policy, the graph displays the limit.
   
Metrics Metrics Description
Normalized IOPS Limit The applied IOPS limit.
Normalized IOPS This shows IOPS that are represented using a weighted size of 32KB by default. This means that a 64KB read or write operation represents 2 normalized I/Os. The weighted size is a configurable parameter.

Delayed Normalized IOPS

This graph shows the normalized IOPS for the I/Os that are delayed due to the application of the IOPS limit.
         
Metrics Metrics Description
Delayed Normalized IOPS This is the IOPS for normalized I/Os that are delayed.

See Also

Update History

04/21/2017 - Added vSAN 6.5 and 6.6 to Products

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