4x vCPU 100% whene FT enabled ?

[dzint]

Hello,

i finaly enable FT on my VM (look here Re: Fault Tolerance vSphere 6.0 Update 01 )

But i have a big problème now, whene user start use this VM (FT enabled) the 4x vCPU of the VM is 100% used and VM is very very slowly.

this VM work great without FT but whene i activate the FT, the vCPU are 100% used !

i have update the two ESXi to latest update, this is screenshot for my esxi

i have 2X CPU per ESXi with 4 CORE: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz

and i use CNA network card 10Gbps for Fault Tolerance

Any one can help me please to activate FT ? please

Best regards

[SpoonTuxedo]

Hi DZint,

What is the resource usage like on the secondary host?

From the Vsphere 6 Best Practice Guide:

If the secondary virtual machine runs out of resources (such as FT logging bandwidth, storage bandwidth, or CPU cycles) that the primary virtual machine has plenty of, then ESXi might slow the primary to allow the secondary to keep up.

For example, if the host on which the secondary is running also has many other secondaries saturating the FT logging bandwidth, but the host on which the primary is running has only one FT virtual machine, then that primary might be slowed to accommodate the lack of resources on the secondary.

When you mention that the CPU usage is high, is this in just the guest OS or is it also showing in ESXi?

[dzint]

Hello and thank you very very mutch for your answer,

i have only ONE VM raining on this Cluster (2 ESXi with only one VM)

and i check 100% use of  vCPU on the OS Guest (Task Manager) whene user connect on VM.

Best regards

[SpoonTuxedo]

Are the high CPU usage values reflected in the hypervisor, through esxtop?

What OS is the guest running?

Is there anything else running on that 10 gbe link at this point in time?

[dzint]

Hello and thank you for your help

i don't check esxtop but i think CPU esxi reflected on vCenter.

OS Guest : Windows Server 2008 R2 with VMware tools installed latest

the CNA network card 10gbps are didicated for Fault Tolerance and i have only one VM one the Cluster (2 ESXi)

thx per advance for your time & help

Best regards

[SpoonTuxedo]

Hi DZint,

Bit stumped on this one.

Is there currently a workload running on the VM?