How do I check my Esxtop latency?

Check ESXi Host Device Latency to Storage with ESXTOP

Table of Contents

Start esxtop by typing esxtop at the command line.
Press d to switch to disk view (HBA mode).
To view the entire Device name, press SHIFT + L and enter 36 in Change the name field size.
Press f to modify the fields that are displayed.

What is DAVG value?

DAVG/cmd. This is the average response time in milliseconds per command being sent to the device. KAVG/cmd. This is the amount of time the command spends in the VMkernel.

What does Esxtop mean?

Esxtop is essentially a VMware version of top, the Linux command line that displays real-time CPU information. The tool runs in the Linux-based Service Console, which means it only supports VMware ESX hosts. For ESXi hosts, VMware offers a tool called resxstop.

How do I know if a VM disk is latency?

Procedure

Log in to the vSphere Web Client.
Click Networking & Security, and then click Installation and Upgrade.
Under Management, go to the required controller, and click the Disk Alert link. The Disk Latency Alerts window appears.

What is DAVG CMD?

DAVG/cmd is the average response time in milliseconds per command being sent to the element. KAVG/cmd is the amount of time the command spends in the VMkernel.

How do I troubleshoot disk latency?

If a straight replacement of the hardware doesn’t fix the problem, there are a couple things you can try:

Reduce access time. If your disk is magnetic, most of the latency can be attributed to moving the drive head.
Add more IOPS.
Alter the RAID settings.

What does DAVG mean?

DAVG

Acronym	Definition
DAVG	Dispositif d’Assistance Ventriculaire Gauche (French: Left Ventricular Assistance Device; cardiology)

What is DAVG and KAVG?

“QAVG: The average queue latency. QAVG is part of KAVG. Response time is the sum of the time spent in queues in the storage stack and the service time spent by each resource in servicing the request. The largest component of the service time is the time spent in retrieving data from physical storage.

How do you use Esxtop CPU?

Once you are logged into the command line interface simply type ‘esxtop’ and hit enter. Within the esxtop screen we can use different keys to change the view and examine certain metrics such as CPU ‘c’, memory ‘m’, network ‘n’, disk ‘d’.

How do you capture Esxtop output?

Collect Performance Metrics from ESXi Hosts with esxtop

Enable SSH on ESXi host and use putty to connect to it.
Run esxtop in batch mode.
Confirm the output file was created.
Export the output off of ESXi host.
Open vSphere Web Client and download the esxtop output file from the VMFS datastore.

What is a good disk latency?

between 10 to 20 ms
For hard drives, an average latency somewhere between 10 to 20 ms is considered acceptable (20 ms is the upper limit). For solid state drives, depending on the workload it should never reach higher than 1-3 ms. In most cases, workloads will experience less than 1ms latency numbers.