CPU Issues

[lsmith254]

Hi All,

I have a small eSXI host with 16 logical processors. I am running 3 VMs on it each assigned 5 CPUs.

Something doesn't seem right. For what is running on this, the CPU should not be struggling like it is. I was wondering if anyone had any ideas on what I can look at to see if there may be an underlying issue that would make CPU performance sub-par? Running just one or two apps pegs it at 99%....I cannot find anything glaring on the OS side and this evening I upgraded to the latest Dell image. Could this be a driver issue or the way I have the CPUs assigned? Thanks.

[jburen · Accepted solution]

Assigning an odd number of CPU's is very uncommon. I would start with 1 or 2 vCPU's per VM and then see if there is CPU contention. If there is you can assign 4 vCPUs for that VM. But more is not always more...  Here is one blog about assigning the optimum number of vCPU's: Maximizing VMware Performance and CPU Utilization But you can find many more on the www...

[lsmith254]

Thanks. My intent was to distribute them, but I will try your suggestion. Interestingly, my host CPU utilization is running about 30-40% so there should not be an issue.