How is performance and scalability related to each other?

1.	How is performance and scalability related to each other?
Answer» A system is said to be scalable if there is INCREASED performance is proportional to the resources added. Generally, performance increase in TERMS of scalability refers to serving more WORK units. But this can also mean being able to HANDLE larger work units when datasets grow. If there is a performance problem in the application, then the system will be slow only for a single user. But if there is a scalability problem, then the system may be fast for a single user but it can get slow under heavy user load on the application.

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