defect in handling peak loads or missing resources | - deny the program under test the resources it normally uses, by employing such methods as deleting files, concurrently running other resource-hungry programs, making less memory available, or disconnecting the system from the network
- run a very large number of copies of the program being tested, all at the same time
| when - a computer becomes short of resources such as memory, disk space or network bandwidth
- files or data are missing
- the system is not permitted to perform certain operations
- the system cannot start new threads
- the system runs out of space in a fixed size data structure
| A defect that occurs when a computer cannot gracefully handle peak loads or missing resources | defect in handling stress and unusual situations |