The amount of CPU resource available in the parent resource pool is insufficient for the operation.

[vishaln]

Below is my shared Cluster size

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Resource Pool created

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Created resource pool for allocate

User requirement is CPU 125 x 2200 Ghz size & Memory 125 x 2 GBs size.

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Task Details:
	Status: The amount of CPU resource available in the parent resource pool is insufficient for the operation. Description: Powering on the new Virtual Machine Start Time: Jan 21, 2020 2:48:26 PM Completed Time: Jan 21, 2020 2:48:39 PM State: error
Error Stack:
	Failed to start the virtual machine. Failed to power on VM. Could not power on virtual machine: Admission check failed for cpu resource. See the VMware ESX Resource Management Guide for information on resource management settings. Group host/user/pool314: Invalid CPU allocation requested for virtual machine vmm0:CM81_53. (min: 4340 mhz, max: -1, minLimit: -1, shares: 4000) Group vm.14461087: Cannot admit virtual machine: CPU admission check failed. Invalid reservation 4340 mhz. Module 'MonitorLoop' power on failed.
Additional Task Details:
	VC Build: 13639324 Error Type: InsufficientCpuResourcesFault Task Id: Task Cancelable: true Canceled: false Description Id: Drm.ExecuteVmPowerOnLRO Event Chain Id: 16433983

Need help on this, what need to change on this

How to fix the issue.

For solution, I do changes before Power On VM that is, edit the VM resource setting and give 0 size in Reservation, after power on set the reservation size as per the limit size.

[Scott Vessey]

The VM CPU reservation of 4340 Mhz is preventing the power on.

Have a look at the current amount of unreserved CPU for the immediate parent object of the VM, and if that parent object has an expandable reservation you should do the same for the grandparent object (and so on). The number of CPUs of the VM could also be a factor, the reserved virtual resource needs to be physically possible.

There are numerous potential root causes as to why you get this error, but insufficient information here.

[vishaln]

Below screenshot of one of the VM

You means to say that I have to set Resource Pool reservation as 4340 Mhz size? Correctly me please.

[Scott Vessey]

The parent resource container for the VM does not have sufficient unreserved capacity when compared to the reservation for that VM.

Look at the parent resource container.

Do you NEED to reserve 7800 Mhz for that VM?

[vishaln]

CPU 125 x 2200 Ghz size & Memory 125 x 2 GBs size this want to set in resource spool.

Do you NEED to reserve 7800 Mhz for that VM? This I set after power on the VM, actual size was 8800 MHz

[vishaln]

Please suggest what need to do

[Scott Vessey]

I suggest you have a good read through this document: https://docs.vmware.com/en/VMware-vSphere/6.7/vsphere-esxi-vcenter-server-67-resource-management-guide.pdf

It should give you a full understanding of VM sizing, resource administration, resource pools and clusters, and more.