Load Runner is an automatic performance and test automation creation from Hewlett-Packard for examining system behaviour and performance, while producing actual load. HP acquired LoadRunner as part of its acquisition of Mercury Interactive in November 2006. HP LoadRunner can feign thousands of concurrent users to put the application through the rigors of real-life user loads, while gathering information from key infrastructure components (Web servers, database servers etc.) The results can then be examined in detail, to explore the reasons for particular behaviour.