性能工具之ab压力测试工具及ab命令详解

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背景

ab小型压力工具,对于在Linux中简单调试还是比较方便,轻巧灵活.

安装

 
   
   
 
  1. yum -y install httpd-tools

查看版本

 
   
   
 
  1. [root@7dgroup2 ~]# ab -V

  2. This is ApacheBench, Version 2.3 <$Revision: 1430300 $>

  3. Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/

  4. Licensed to The Apache Software Foundation, http://www.apache.org/


  5. 帮助

  6. [root@7dgroup2 ~]# ab help

  7. ab: invalid URL

  8. Usage: ab [options] [http[s]://]hostname[:port]/path

  9. Options are:

  10. -n requests Number of requests to perform

  11. -c concurrency Number of multiple requests to make at a time

  12. -t timelimit Seconds to max. to spend on benchmarking

  13. This implies -n 50000

  14. -s timeout Seconds to max. wait for each response

  15. Default is 30 seconds

  16. -b windowsize Size of TCP send/receive buffer, in bytes

  17. -B address Address to bind to when making outgoing connections

  18. -p postfile File containing data to POST. Remember also to set -T

  19. -u putfile File containing data to PUT. Remember also to set -T

  20. -T content-type Content-type header to use for POST/PUT data, eg.

  21. 'application/x-www-form-urlencoded'

  22. Default is 'text/plain'

  23. -v verbosity How much troubleshooting info to print

  24. -w Print out results in html tables

  25. -i Use HEAD instead of GET

  26. -x attributes String to insert as table attributes

  27. -y attributes String to insert as tr attributes

  28. -z attributes String to insert as td or th attributes

  29. -C attribute Add cookie, eg. 'Apache=1234'. (repeatable)

  30. -H attribute Add Arbitrary header line, eg. 'Accept-Encoding: gzip'

  31. Inserted after all normal header lines. (repeatable)

  32. -A attribute Add Basic WWW Authentication, the attributes

  33. are a colon separated username and password.

  34. -P attribute Add Basic Proxy Authentication, the attributes

  35. are a colon separated username and password.

  36. -X proxy:port Proxyserver and port number to use

  37. -V Print version number and exit

  38. -k Use HTTP KeepAlive feature

  39. -d Do not show percentiles served table.

  40. -S Do not show confidence estimators and warnings.

  41. -q Do not show progress when doing more than 150 requests

  42. -g filename Output collected data to gnuplot format file.

  43. -e filename Output CSV file with percentages served

  44. -r Don't exit on socket receive errors.

  45. -h Display usage information (this message)

  46. -Z ciphersuite Specify SSL/TLS cipher suite (See openssl ciphers)

  47. -f protocol Specify SSL/TLS protocol

  48. (SSL3, TLS1, TLS1.1, TLS1.2 or ALL)

  49. [root@7dgroup2 ~]#

  • -n在测试会话中所执行的请求个数。默认时,仅执行一个请求。

  • -c一次产生的请求个数。默认是一次一个。

  • -t测试所进行的最大秒数。其内部隐含值是-n 50000,它可以使对服务器的测试限制在一个固定的总时间以内。默认时,没有时间限制。

快速上手

 
   
   
 
  1. [root@7dgroup2 ~]# ab -n10 -c 10 http://172.17.211.142:8089/

  2. This is ApacheBench, Version 2.3 <$Revision: 1430300 $>

  3. Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/

  4. Licensed to The Apache Software Foundation, http://www.apache.org/


  5. Benchmarking 172.17.211.142 (be patient).....done



  6. Server Software: #服务器软件

  7. Server Hostname: 172.17.211.142 #域名

  8. Server Port: 8089 #请求端口号


  9. Document Path: / #文件路径

  10. Document Length: 76443 bytes #页面字节数


  11. Concurrency Level: 10 #请求的并发数

  12. Time taken for tests: 0.064 seconds #总访问时间

  13. Complete requests: 10 #请求成功数量

  14. Failed requests: 0 #请求失败数量

  15. Write errors: 0

  16. Total transferred: 766030 bytes #请求总数据大小(包括header头信息)

  17. HTML transferred: 764430 bytes #html页面实际总字节数

  18. Requests per second: 157.09 [#/sec] (mean) #每秒多少请求,服务器的吞吐量

  19. Time per request: 63.656 [ms] (mean) #用户平均请求等待时间

  20. Time per request: 6.366 [ms] (mean, across all concurrent requests) # 服务器平均处理时间,也就是服务器吞吐量的倒数

  21. Transfer rate: 11751.86 [Kbytes/sec] received #每秒获取的数据长度


  22. Connection Times (ms)

  23. min mean[+/-sd] median max

  24. Connect: 0 0 0.0 0 0 #网络链接

  25. Processing: 8 36 17.1 41 60 #系统处理

  26. Waiting: 3 24 18.7 18 55 #等待

  27. Total: 9 37 17.1 42 60

  28. #Total并不等于前三行数据相加,因为前三行的数据并不是在同一个请求中采集到的,

  29. #可能某个请求的网络延迟最短,但是系统处理时间又是最长的呢。

  30. #所以Total是从整个请求所需要的时间的角度来统计的。

  31. Percentage of the requests served within a certain time (ms)

  32. 50% 42

  33. 66% 45

  34. 75% 51

  35. 80% 52

  36. 90% 60

  37. 95% 60

  38. 98% 60

  39. 99% 60

  40. 100% 60 (longest request)





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