| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Active_commands |
Indicates the number of commands on the ESX Server VMKernel that are currently active. |
Number |
|
| Queued_commands |
Indicates the number of commands in the ESX Server VMKernel that are currently queued. |
Number |
A consistent increase in the value of this measure could imply that the VMKernel is unable to execute storage commands, resulting in a queue that keeps growing. You might want to investigate the reasons behind such an occurrence. |
| Command_queue_used |
Indicates the percentage of queue depth used by the ESX server VMKernel active commands. |
Percent |
|
| Commands |
Indicates the number of commands issued per second. |
Commands/Sec |
The workload on the storage subsystem is indicated by this metric |
| Reads |
Indicates the rate at which read commands were issued. |
Reads/Sec |
|
| Writes |
Indicates the rate at which write commands were issued. |
Writes/Sec |
|
| Data_reads |
Indicates the rate at which data was read. |
MB/Sec |
|
| Data_writes |
Indicates the rate at which data was written. |
MB/Sec |
|
| Avg_device_latency |
Indicates the average device latency per command. |
Msecs/cmd |
High latency is a cause for concern, as it is an indicator of contention for storage resources. |
| Avg_vmkernel_latency |
Indicates the average ESX server VMKernel latency, per command. |
Msecs/cmd |
|
| Avg_guest_latency |
Indicates the average guest operating system latency, per command. |
Msecs/cmd |
|
| Commands_aborted |
Indicates the number of commands aborted per second. |
Aborts/Sec |
|
| Commands_reset |
Indicates the number of commands reset per second. |
Resets/Sec |
|
This will report the following measures only if the procedure discussed in Section 9 of the Monitoring VMware Infrastructures is followed: