Here is a sample output of esxtop on a host running no VMs at all.   9:58:51am up 61 days 13:51, 597 worlds, 0 VMs, 0 vCPUs; CPU load average: 0.08, 0.09, 0.11… (Show more)
in VMware vSphere™
After about 49 days of uptime, the system process of my ESXi 6.7 U1 host (free version) is consuming a lot of CPU time:         ID      GID NAME             NWLD   %USED    %RUN    %SYS   %WAIT… (Show more)
in ESXi