ab test installation: run the command under linux: yum install httpd-tools
ab -c 1000 -n 1000 http://127.0.0.1/index.jsp
-n requests //Number of requests executed in the test session. By default, only one request is executed
-c concurrency //The number of requests generated at one time. Default is one at a time
Server Software: Apache/2.2.19 ##apache version
Server Hostname: vm1.jianfeng.com ##Requested machine
Server Port: 80 ##Request port
Document Path: /a.html
Document Length: 25 bytes ##page length
Concurrency Level: 100 ##Concurrency
Time taken for tests: 0.273 seconds ##Total time taken
Complete requests: 1000 ##Requests
Failed requests: 0 ##Failed requests
Write errors: 0
Total transferred: 275000 bytes ##Total The number of bytes transferred, including http header information, etc.
HTML transferred: 25000 bytes ##html bytes, the actual page transfer bytes
Requests per second: 3661.60 [#/sec] (mean) ##How many requests per second, This is a very important parameter value, server throughput
Time per request: 27.310 [ms] (mean) ##User average request waiting time
Time per request: 0.273 [ms] (mean, across all concurrent requests) ##Server average Processing time, which is the reciprocal of server throughput
Transfer rate: 983.34 [Kbytes/sec] received ##Length of data obtained per second
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 2.3 0 16
Processing: 6 25 3.2 25 32
Waiting: 5 24 3.2 25 32
Total: 6 25 4.0 25 48
Percentage of the requests served within a certain time (ms)
50% 25 ## 50% of requests returned within 25ms
66% 26 ## 60% of requests returned within 26ms
75% 26
80% 26
90% 27
95% 31
98% 38
99% 43
100% 48 (longest request)