In an application execution system having a plurality of application servers and an application master in an application execution system, the application master stores a plurality of applications, including a respective application, in a library for distribution among the application servers, adds a first instance of the respective application from the library to a respective application server for execution, and obtains usage information of one or more applications added to the application servers. In accordance with the usage information, the application master performs one of a predefined set of actions that includes: adding a second instance of the respective application to the plurality of application servers; and removing the first instance of the respective application from the respective application server.