Your customer is reporting less than optimal performance for their online payment processing application. The payment processing application is running on a Windows Server cluster with the back-end…

Your customer is reporting less than optimal performance for their online payment processing application. The payment processing application is running on a Windows Server cluster with the back-end Oracle databases running on Oracle Enterprise Linux (OEL). Both the application and database environments have been presented storage from the customer's VNX solution. Which tool is best suited to identify database performance issues?