If you normally use Linux you will be familiar with top probably.
Well VMWare has esxtop
Commands when in esxtop are:
s – change the screen update delay – values from 0.1 seconds upwards
If you hit space, it will immediatly update the screen.
f or F allows you to add additional fields / columns
c allows you to view CPU resource utilization
m allows you to view memory resource utilization
d allows you to view storage adapter resource utilization
u allows you to view storage device resource utilization
v allows you to view VM resource utilization
n allows you to view network resource utilization.
All these commands can help you to identify any potential bottlenecks or areas you need to make some additional resource changes.