Ten key performance indicators of software applications

1、 response time （Response Time）： It refers to the timing from the client sending a request , All the time it takes until the client receives the response result returned from the server . Response time composition ： When the request was sent 、 Network transmission time and server processing time are three parts . The shorter the response time, the better , The current acceptance time is 2/5/8 second .

2、 throughput （Throughput）： Refers to the network 、 Equipment and systems , Successfully transmit data in unit time / Ability to deal with things, etc （ In bits 、 byte 、 Measurement of the number of transactions ）. For indicators ： Number of transactions completed per second （TPS）、 Hits per second （HPS）

        Number of transactions completed per second （Transaction Per second）： The number of transactions or transactions that the system can process per second , It is an important indicator to measure the processing capacity of the system . The bigger the better .

3、QPS （Queries Per Second）： Number of queries processed per second . Is the number of queries a server can query per second , It is a measure of how much traffic a specific query server handles in a given period of time .

4、RPS （Requests Per Second）： The number of requests that can be processed per second . Equivalent to QPS

5、 Hits per second （Hit Per Second）： Every second the user goes to Web Server submitted HTTP Number of requests .

6、PV（ page view）： Page visits , Every page visit is recorded 1 Time , Refresh many times , Cumulative Statistics .

7、UV （Unique visitor)： Independent visitor Through the client browser cookies Realization . Same browser , Multiple clicks count only once , Do not accumulate . Different browser access , Separate Statistics .

8、IP（ Internet Protocol）： It means passing through ip Of visits . One IP Multiple visits only count once , Visits don't accumulate .

ab In the tools " Average user request wait time " and " The average request waiting time of the server " Definition of indicators

9、 The average request waiting time of the server （Time per request: across all concurrent requests） Time spent processing all requests / Total requests namely Time taken for tests/Complete requests

10、 Average user request wait time （Time per Request）： The time taken to test / Concurrency times （Time taken for tests/（Complete requests/Concurrency Level）:

Average user request wait time （Time per Request）： The average request waiting time of the server * Number of concurrent users （Time taken for tests/Complete requests）*Concurrency Level

Total time ：29.672 second

Total number of requests ：100

Concurrency number ：15

The average request waiting time of the server - A single request ： Total time / Total number of requests =296.72 millisecond

Average user request wait time - Time spent each time ： Total time /（ Total number of requests / Concurrency number ）=29.672/（100/15）=4.4508

 

ab Command interpretation

stay cmd Enter in line ：ab -n 100 -c 10 http://www.baidu.com/
-n Indicates the number of requests ,-c Represents the number of concurrency , Address of the test .