An application tuning server-side component, and a method, system, and computer program product for application tuning, provides application deployers with a single, unified facility for modifying the relevant parameters. A method of tuning an application deployed in an application server comprises the steps of deploying the application in the application server, invoking an application tuning server-side component operable to retrieve information relating to application parameters to be tuned, receiving specifications of values of application tuning parameters, and tuning the application using the received specified parameter values. The application tuning server-side component may be implemented using Java Management Extensions.