linux環境中ab命令簡介及結果分析

神諭丶發表於2015-03-23
Linux
ab（apache bench）是apache下的一個工具，主要用於對web站點做壓力測試，

基礎用法：
其中-c選項為一次傳送的請求數量，及併發量。
-n選項為請求次數。


實驗測試：
  1. [dev@web ~]$ ab -c 20 -n 50000 http://192.168.1.210/
  2. This is ApacheBench, Version 2.3
  3. Copyright 1996 Adam Twiss, Zeus Technology Ltd,
  4. Licensed to The Apache Software Foundation,
  6. Benchmarking 192.168.1.210 (be patient)
  7. Completed 5000 requests
  8. Completed 10000 requests
  9. Completed 15000 requests
  10. Completed 20000 requests
  11. Completed 25000 requests
  12. Completed 30000 requests
  13. Completed 35000 requests
  14. Completed 40000 requests
  15. Completed 45000 requests
  16. Completed 50000 requests
  17. Finished 50000 requests
  19. Server Software: nginx/1.6.2
  20. Server Hostname: 192.168.1.210
  21. Server Port: 80
  23. Document Path: /
  24. Document Length: 41005 bytes # 請求的頁面大小
  26. Concurrency Level: 20 # 併發量
  27. Time taken for tests: 1180.733 seconds # 測試總共耗時
  28. Complete requests: 50000 # 完成的請求
  29. Failed requests: 0 # 失敗的請求
  30. Write errors: 0 # 錯誤
  31. Total transferred: 2067550000 bytes # 總共傳輸資料量
  32. HTML transferred: 2050250000 bytes
  33. Requests per second: 42.35 [#/sec] (mean) # 每秒鐘的請求量。（僅僅是測試頁面的響應速度）
  34. Time per request: 472.293 [ms] (mean) # 等於 Time taken for tests/(complete requests/concurrency level) 即平均請求等待時間（使用者等待的時間）
  35. Time per request: 23.615 [ms] (mean, across all concurrent requests) # 等於 Time taken for tests/Complete requests 即伺服器平均請求響應時間 在併發量為1時 使用者等待時間相同
  36. Transfer rate: 1710.03 [Kbytes/sec] received # 平均每秒多少K，即頻寬速率
  39. Connection Times (ms)
  40. min mean[+/-sd] median max
  41. Connect: 0 1 18.5 0 1001
  42. Processing: 38 471 534.1 155 9269
  43. Waiting: 37 456 524.6 147 9259
  44. Total: 40 472 534.5 155 9269
  47. Percentage of the requests served within a certain time (ms)
  48. 50% 155
  49. 66% 571
  50. 75% 783
  51. 80% 871
  52. 90% 1211
  53. 95% 1603
  54. 98% 1839
  55. 99% 2003
  56. 100% 9269 (longest request)





附錄：

Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:
    -n requests     Number of requests to perform    
    -c concurrency  Number of multiple requests to make    
    -t timelimit    Seconds to max. wait for responses    
    -b windowsize   Size of TCP send/receive buffer, in bytes    # 
    -p postfile     File containing data to POST. Remember also to set -T
    -u putfile      File containing data to PUT. Remember also to set -T
    -T content-type Content-type header for POSTing, eg.
                    'application/x-www-form-urlencoded'
                    Default is 'text/plain'
    -v verbosity    How much troubleshooting info to print
    -w              Print out results in HTML tables
    -i              Use HEAD instead of GET
    -x attributes   String to insert as table attributes
    -y attributes   String to insert as tr attributes
    -z attributes   String to insert as td or th attributes
    -C attribute    Add cookie, eg. 'Apache=1234. (repeatable)
    -H attribute    Add Arbitrary header line, eg. 'Accept-Encoding: gzip'
                    Inserted after all normal header lines. (repeatable)
    -A attribute    Add Basic WWW Authentication, the attributes
                    are a colon separated username and password.
    -P attribute    Add Basic Proxy Authentication, the attributes
                    are a colon separated username and password.
    -X proxy:port   Proxyserver and port number to use
    -V              Print version number and exit
    -k              Use HTTP KeepAlive feature
    -d              Do not show percentiles served table.
    -S              Do not show confidence estimators and warnings.
    -g filename     Output collected data to gnuplot format file.
    -e filename     Output CSV file with percentages served
    -r              Don't exit on socket receive errors.
    -h              Display usage information (this message)
    -Z ciphersuite  Specify SSL/TLS cipher suite (See openssl ciphers)
    -f protocol     Specify SSL/TLS protocol (SSL2, SSL3, TLS1, or ALL)






來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/29773961/viewspace-1470071/，如需轉載，請註明出處，否則將追究法律責任。

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