Load testing can be conducted in two ways. Longevity testing, also called endurance testing, evaluates a system's ability to handle a constant, moderate work load for a long time. Volume testing, on the other hand, subjects a system to a heavy work load for a limited time. Either approach makes it possible to pinpoint bottlenecks, bugs and component limitations. For example, a computer may have a fast processor but a limited amount of RAM (random-access memory). Load testing can provide the user with a general idea of how many applications or processes can be run simultaneously while maintaining the rated level of performance.
Load testing differs from stress testing, which evaluates the extent to which a system keeps working when subjected to extreme work loads or when some of its hardware or software has been compromised. The primary goal of load testing is to define the maximum amount of work a system can handle without significant performance degradation.
