What is ESXTOP?
The VMware esxtop tool provides a real-time view of ESX/i Server worlds. The term world refers to processes running on the VMkernel. The focus on this deep dive will be CPU usage.There are three types of worlds:
System: The worlds that are needed to perform various system services. These include one idle world per physical CPU that runs when there is nothing else to run on that physical CPU, helper worlds for performing asynchronous tasks and driver worlds.
Service Console: The world for the service console. It always runs on physical CPU0. The service console does not exist on the ESXi server.
Virtual Machine: The world for each virtual CPU. This is the world you look at when troubleshooting.