ba36932d__Enterprise_Business_Community__Answer
[0] 3. [Question] What are the key metrics someone needs to monitor? [Answer] 
This depends on your needs and your specific IT environment. VMware offers guidance on this issue. Please download their guide to obtain more information about available metrics and their definitions. See page 287. http://www.vmware.com/pdf/ProgrammingGuide201.pdf
Infrastructure Management Software Blog - HP Enterprise Business Community
Answer