Performance testing Terminology

NFRs ( Non Functional Requirements)

Average Response Time – The average turnaround time from the request issued from the client to response received from the server to client.

Transactions per Second – Number of transactions happened in a unit time.

TPS α 1/Response Time

Throughput- Amount of data downloaded from server to client in a unit of time ( MB/sec or bytes/sec)

Hits per Second Number of hits happened to the server in a unit time.

90 Percentile – 90% of the transactions fall under this value.

Bottleneck- Obstructions in the system.

Throughput- The amount of data downloaded from the server to the client in Unit of time ( Bytes/ MBs)

Throughput ∞ Load

Pacing – Time space between one iteration to another.- to conrol the number of txns ( TPS)

Transaction: Transaction is an end-to-end measurement that defines the start and end point of a user request which is responded by a server. For Example – “Clicking a Submit Button”, “Clicking on web link”

Transaction Response Time: Time take by a transaction to get responded or serviced by the server.

Concurrency: The group of users within a business processing environment that are requesting same processing services (functionality) from the environment all at the same point in time.
Simultaneous Users: The group of users within a business processing environment that are requesting different processing services (functionalities) from the environment all at the same point in time.

Rendezvous point

Think Time: The time between the browser displaying a page to the user and the user clicking a link to browse to the next page. This time could be the time it takes the user to read the content of the page or decide what to do next. Load testing tool records this time when recording a Business Case and uses it to accurately simulate the users when performing a test

Virtual User: A software entity generated by the performance testing tool, that simulates a real user by repeatedly performing a Business Case during a load test