Dynamically Resizing A Virtual Machine Container

A computer-usable medium having computer-readable program code embodied therein for causing a computer system to perform a method of dynamically resizing a virtual machine container, the method comprising:

• using a queueing model to determine an uncorrected optimal utilization based on a desired performance for a multi-tiered application and transaction mix information that describes a mix of transactions that result from executing a plurality of application components associated with the multi-tiered application;
• and determining a corrected optimal utilization based on the desired application-level performance, a measured application-level performance and the uncorrected optimal utilization;
• and
• enabling automatic modification of an amount of a physical resource that a virtual machine container is entitled to for executing a particular application component associated with the multi-tiered application, wherein the amount is automatically modified based on the corrected optimal utilization.