Question about on VM consolidation number and percentage of CPU Ready

Hi people,

I'm trying to consolidate as many VM in simple ESXi servers on HP on AMD Opteron blades with 32 CPU available logic (based on the number on the vSphere console)

Can anyone here please share some thoughts and comments about what is the best indication to avoid adding more VMS that ESXi hosts can treat?

I must ensure that the number of vCPU altogether exceed is not 32 logic processor available, or it can be more than that?

Running a script powershell LucD to collect CPU ready percentage shows that some virtual machines had prepared more than 10% CPU (for the most part 2 x vCPU) up to 22% (this one with 8 x vCPU)

Hello

I had the same situation on HP Blade and DL serer with two different CPU vendors.

Intel CPU based on my experiences, has better performance compared to AMD CPU when the CPU is too committed on ESXi server.

I have HP BL460c G6 and G7 on one of our sites, the server has 12 physical and 24 cores logic core.

I assigned four cores to each customers (to fix the voice problem) and virtual machines are working properly, RDY CPU is less than 5% in general and there is no performance problem.

Each blade server hosts 20 VMs and total virtual cores are 80 cores, so we attribute 1:3 (Physics: virtual) core.

On the other hand, I DL585 G7 on our sites some server has 64 physical cores (4 Sockets and each catches have 16 cores). Servers host 50 active VMs usually but RDY CPU is greater than 10% or 7% on them. Total virtual cores are 200 and CPU assignment ratio is 3.

I think that, if you want to optimize performance on AMD CPU, 1:1 or 1:2 CPU assignment report is the best choice.

Tags: VMware

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