Web Performance Test Terminology

Concurrent Users :

2
      web performance test, this 2

number of concurrent users :

The number of concurrent clients is the number of simultaneous requests. There are 2 common misconceptions about the number of concurrent users . One of the misconceptions is that the number of concurrent users is understood as the number of users who use the system, on the grounds that they may use the system at the same time, and that a more near-correct view is that the number of online users is understood as the number of concurrent users. The fact that online users are not necessarily associated with other users, such as users who are browsing the web, has no effect on the server, but the number of online users is one of the main bases for calculating the number of concurrent users.

Request Response Time :

refers to the time at which the client makes a request to the entire process of getting a response. In some tools, the request response time is usually called"tllb", which is "hour to last byte", which means starting a request, The time it takes for the client to receive the response time of the last byte. The unit of the request response time process is typically " seconds " or " milliseconds ".

Transaction Response Time :

A transaction may consist of a series of requests, and the response time of a transaction is primarily for the user, and is a macro concept that is presented to the user in order to explain the business response time. For example , the response time for a cross-line withdrawal transaction is made up of a series of requests. Transaction response time and subsequent business throughput rates are all parameters that directly measure system performance.

Throughput :

refers to the sum of the amount of data transmitted over the network during a performance test. Throughput / transfer time is the throughput rate.

TPS :

Transaction per second, the number of transactions or transactions that the system can process each second. It is an important indicator to measure the system's processing ability.

Ctr :

   HPS, every second the userWEBServer-SubmittedHTTPThe number of requests. This indicator isWEBan application-specific indicator: WEBapplication is "Request-Response"mode, the user makes a request and the server is processed once, so click YesWEBthe smallest unit of trade that the app can handle. If you define each click as a trade, CTR andTPSis a concept. It is easy to see that the greater the CTR, the greater the pressure on the server. CTR is just a performance reference, and it's important to analyze the impact of clicks. Note that the Click here does not refer to a single click of the mouse, because in a single click, the client may issue multipleHTTPrequest.

Resource utilization:

      cpu utilization, Disk utilization, and so on. Resource utilization is the main basis for analyzing system performance indicators to improve performance, so it is  web web servers, operating systems, database servers, networks, etc., is the primary reference for testing and analyzing bottlenecks. In the web