ubuntu中使用ab压测

本是古典何须时尚 2023-05-29 14:28 27阅读 0赞

*  安装

apt-get update
    apt-get install apache2-utils -y
    apt-get install man -y
    man ab  #查看ab语法

*  [语法][Link 1]

ab [ -A auth-username:password ] [ -b windowsize ] [ -B local-address ] [ -c concurrency ] [ -C cookie-name=value ] [ -d ] [ -e csv-file ] [ -E client-certificate file ] [ -f protocol ] [ -g gnuplot-file ] [ -h ] [ -H custom-header ] [ -i ] [ -k ] [ -l ] [ -m HTTP-method ] [ -n requests ] [ -p POST-file ] [ -P proxy-auth-username:password ] [ -q ] [ -r ] [ -s timeout ] [ -S ] [ -t timelimit ] [ -T content-type ] [ -u PUT-file ] [ -v verbosity] [ -V ] [ -w ] [ -x <table>-attributes ] [ -X proxy[:port] ] [ -y <tr>-attributes ] [ -z <td>-attributes ] [ -Z ciphersuite ] [http[s]://]hostname[:port]/path

*  示例

ab -n 5 -c 1 -p data.json -T application/json -H 'Authorization: Token abcd1234' http://dmcv.service.dl.bdp.com.cn/car
    
    data.json中内容如下：
    {"service_type":"test", "service_key":"test"}

*  结果，各字段的详细意义可参考[该文章][Link 2]：

Server Software:        nginx/1.15.8
    Server Hostname:        dmcv.service.dl.bdp.com.cn/car
    Server Port:            80
    
    Document Path:          /car
    Document Length:        102 bytes
    
    Concurrency Level:      1                #并发数，对应命令中 -c字段值
    Time taken for tests:   0.051 seconds    #测试总时间
    Complete requests:      5                #成功请求数
    Failed requests:        1                #错误请求数
        (Connect: 0, Receive: 0, Length: 1, Exceptions: 0)
    Total transferred:      1550 bytes       #总的网络传输量
    HTML transferred:       510 bytes        #html内容传输量
    Requests per second:    98.18 [#/sec] (mean)  #平均吞吐率
    Time per request:       10.185 [ms] (mean)    #用户平均请求等待时间
    Time per request:       10.185 [ms] (mean, across all concurrent requests)  #服务端平均处理时间
    Transfer rate:          29.72 [Kbytes/sec] received  #网络流量，排查流量大小造成的延时
    
    Connection Times (ms)                     #网络消耗时间
                  min  mean[+/-sd] median   max
    Connect:        1    2   1.8      1       5
    Processing:     5    8   6.3      5      19
    Waiting:        5    8   6.4      5      19
    Total:          7   10   6.1      9      21

*  关于[Failed requests][]的讨论

原因：返回结果的长度不同导致Failed requests值不为0
    The apache benchmarking tool (ab) assumes that length of response content will be the same during entire test. It stores the content length of the first response. If any of further responses have different content length, they result in "length failures"
    
    解决方法：
    命令行中加 -l 即可

参考文献：

1.  [Install Apache Bench – Ubuntu 14.04][Install Apache Bench _ Ubuntu_14.04]
2.  [ab工具语法][Link 1]
3.  [超实用压力测试工具－ab工具][Link 2]
4.  L[oad Testing with AB … fake failed requests (length)][Failed requests]

[Link 1]: https://httpd.apache.org/docs/2.4/programs/ab.html
[Link 2]: https://www.jianshu.com/p/43d04d8baaf7
[Failed requests]: https://stackoverflow.com/questions/579450/load-testing-with-ab-fake-failed-requests-length
[Install Apache Bench _ Ubuntu_14.04]: https://kuntalchandra.wordpress.com/2015/10/10/install-apache-bench-ubuntu-14-04/