This is done by gradually ramping-up the number of Vusers until the system "chokes" at a breakpoint (when the number of connections flatten out, response time degrades or times out, and errors appear).
Such loads are more like the arrival rate to web servers than constant loads.Each run identifies the minimum, average, median, and maximum times for each action.This is done to make sure that data and processing of multiple users are appropriately segregated.The Test Policy is the document which describes an organization's philosophy towards the testing (or quality assurance) of software.The test policy is complementary to, or a component of, the organization's Quality Policy, which describes the basic views and aims of a company, regarding quality, as pursued by management.There are two areas of provision (two sets of budgeted costs): The business perspective measures "busy-ness" using metrics such as the number of "transactions per second" The estimates are based on Estimated Market (User) Usage Patterns which feed Budgets & Forecasts of Costs and revenues Sudden peaks are common, as illustrated by this graph of search interest about a movie title: Measures of "Load" provide a guage of the amount of work, such as "horsepower" in the physical world and MB of data transferred per second. Use the Poisson Distribution Each piece of equipment has a limit on how much it can produce.An assembly can only handle as much as its smallest channel. Logout/Logoff Each possible action during user sessions (the paths through the application) can be graphically depicted with lines when using the industry-common User Community Modeling Language (UCML) Parentheses after the action indicate the likelihood of that action occuring.One of the key "Success factors" of a performance measurement project is the availability of resources when needed.Waiting for resources (or working around the lack of resources) is one of the major reasons for project delays.Cash memory is the part of the computer that remembers how much money you spent on your computer. Variations in configurations and database-access scenarios for each iteration. An Introduction into the Testing and Test Control Notation (TTCN-3).The more you spend on your computer, the faster it will work. Mock-ups of the statistics and graphs to be generated after each test (for each build) are created at this time. Computer Networks, Volume 42, Issue 3, Elsevier, June 2003.