1. A method for providing data to a user interface for performance monitoring, the method comprising: acquiring, by a data definition acquiring module executing in a computer system, a data definition, wherein the data definition is generated in response to a definition of the user interface; acquiring, by a data acquiring module executing in the computer system, data from data sources based on the data definition; processing, by a data processing module executing in the computer system, the acquired data based on the data definition; caching, by a caching module executing in the computer system, the processed data in a cache; and in response to the caching of the processed data in the cache, loading by a user, the user interface for the performance monitoring, wherein at a time of the loading by the user of the user interface for the performance monitoring, running data corresponding to the user interface has already been stored in the cache by caching the processed data in the cache, to improve display speed within the user interface in comparison to processing the acquired data in the user interface, and wherein the data definition specifies a frequency at which the data is acquired from the data sources and a manner of displaying the acquired data.