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ESXi 6.5.0 fails to start a VM with a message "Maximum virtual machines limit reached: ## (#### worlds)"

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Maximum virtual machines limit reached: ## (##### worlds)

ESXi 6.5.0 by default determines the maximum number of VMs dynamically at runtime. In certain scenarios this might be too conservative and you will not be able to start a virtual machine. If you are observing a message like below when starting a VM then you have hit the limit.
Maximum virtual machines limit reached: ## (##### worlds).
This behavior is controlled by VMkernel.Boot.maxVMs in Advanced settings. Change this to a value that might be reasonable based on CPU, memory and network capacity. The same setting can be changed from SSH shell like below: 
[root@localhost:~] esxcli system settings kernel set -s maxVMs -v 1024
Reboot the server for this change to take effect.
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