In the testing literature, the term "load testing" is usually defined as the
process of exercising the system under test by feeding it the largest tasks it
can operate with. Load testing is sometimes called volume testing, or
Examples of volume testing:
testing a word processor by editing a very large
testing a printer by sending it a very large job
testing a mail server with thousands of users
a specific case of volume testing is zero-volume
testing, where the system is fed empty tasks
of longevity/endurance testing:
expose bugs that do not surface in cursory testing,
such as memory management bugs, memory leaks, buffer overflows, etc.
ensure that the application meets the performance
baseline established during performance testing. This is done by running
regression tests against the application at a specified maximum load.
Although performance testing and load testing can seem similar, their goals are
different. On one hand, performance testing uses load testing techniques and
tools for measurement and benchmarking purposes and uses various load levels. On
the other hand, load testing operates at a predefined load level, usually the
highest load that the system can accept while still functioning properly. Note
that load testing does not aim to break the system by overwhelming it, but
instead tries to keep the system constantly humming like a well-oiled machine.
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