All virtual machines have log files for events, tasks, and alarms. You can view them to gather information about possible failures or malfunctions that might occur because of lack of resources.

Virtual machine events can be ESX queries, errors, or other events like powering on or powering off the virtual machine. Events inform you of anything that occurs during the lifetime of a virtual machine.

Virtual machine alarms are notifications that are triggered when specific events happen to a virtual machine. A virtual machine alarm can be CPU usage that exceeds the designated usage. Depending on the severity of the alarm, you can make a decision to move a virtual machine to another host or add additional hardware to the current host.

Tasks are high-level actions, such as powering on a virtual machine, that the user performs manually or that you schedule to perform at a certain time. You can only view scheduled tasks. You cannot schedule tasks with vSphere Web Access.