How to check which VM causes high latency

[rajaniyer]

Hi

When there was high I/O issue we always  use to get high latency at Task & events at ESX Host & Datstore level.

As the same Datastore is used by so many no. of VMs and in case of ESX host also many VMs has been hosted.

I would like to know how I can narrow down the problem and locate the VM which causes the high I/O.

Please suggest.

Thanks

Rajan

[lakshya32]

Hi rajaniyer

Welcome to the forum.

please use inbuilt performance monitor and monitor which vm network utilization are high .

other way we can use some monitoring tools  like op manager.

"When you fail to plan, you plan to fail."

[Davoud Teimouri]

Hi,

You need to check IOPs numbers for read and write for VMs on datastore performance tab,

On that, you'll see top 10 of virtual machines with highest latencies and highest IOPs,

So after check them, you should check some features and product that they are installed on your virtual machines,

Such as antivirus and Windows update service,

Based my experinece, antivirus update is cuase of this problem.

BR

[athlon_crazy]

You can try ssh to ESXi console and run #esxtop

Then press "d" and switch to VM by pressing "v"

Then monitor read and write latency.