This paper explores one of the important issues that IT Managers and Directors must deal with after the virtualization of important business applications. Virtualization stops many existing Performance Management tools from solving this problem, and creates new problems that require new tools and new approaches to be dealt with. How does IT defend itself against claims from the business and user communities that the virtual infrastructure is causing applications performance and end user experience issues? Read on to learn how to find performance and configuration bottlenecks that impact applications performance in the following areas:

• Clock ownership
• Capacity planning and management
• Density and virtualization
• Static vs. dynamic environments