ApacheBench 主要是用來測試阿帕奇服務器執行效率用的。安裝好 apache 服務器套件後，進入 bin 目錄，就可以找到該可執行文件 ab.exe 。
ApacheBench 可以針對某一特定 URL 模擬出連續的聯機請求，同時還可以仿真出同時間點個數相同的聯機請求，因而利用 ApacheBench 可幫助我們在網站開發期間仿真實際上線可能的情況，利用仿真出來的數據做爲調整服務器設定或程序的依據。
ab 用法如下
Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:
-n requests Number of requests to perform # 請求次數
-c concurrency Number of multiple requests to make ＃同一時間發出多少個請求（並行連接）
-t timelimit Seconds to max. wait for responses
-p postfile File containing data to POST
-T content-type Content-type header for POSTing
-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
-s Use httpS instead of HTTP (SSL)
-h Display usage information (this message)
基本用法 :
ab -n 全部請求數 -c 併發數 測試 url
例 :ab -n 1000 -c 50 http://www.abc.com/a.php
得到結果類似於 ( 後面顏色字爲中文翻譯 ):
Server Software: Apache/2.0.55
Server Hostname: localhost
Server Port: 80
Document Path: /1.php
Document Length: 82522 bytes # 請求文檔大小
Concurrency Level: 50 # 併發數
Time taken for tests: 92.76140 seconds # 全部請求完成耗時
Complete requests: 10000 # 全部請求數
Failed requests: 1974 # 失敗的請求
(Connect: 0, Length: 1974, Exceptions: 0)
Write errors: 0
Total transferred: 827019400 bytes # 總傳輸大小
HTML transferred: 825219400 bytes
Requests per second: 108.61 [#/sec] (mean) # 每秒請求數 ( 平均 )
Time per request: 460.381 [ms] (mean) # 每次併發請求時間 ( 所有併發 )
Time per request: 9.208 [ms] (mean, across all concurrent requests) # 每一請求時間 ( 併發平均 )
Transfer rate: 8771.39 [Kbytes/sec] received # 傳輸速率
Connection Times (ms) # 連接時間
min mean[+/-sd] median max
Connect(# 連接 ): 0 0 2.1 0 46
Processing(# 處理 ): 31 458 94.7 438 1078
Waiting(# 等待 ): 15 437 87.5 422 938
Total: 31 458 94.7 438 1078
其它參數 :
-n requests 全部請求數
-c concurrency 併發數
-t timelimit 最傳等待迴應時間
-p postfile POST 數據文件
-T content-type POST Content-type
-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 加入 cookie, eg. 'Apache=1234. (repeatable)
-H attribute 加入 http 頭 , eg. 'Accept-Encoding: gzip'
Inserted after all normal header lines. (repeatable)
-A attribute http 驗證 , 分隔傳遞用戶名及密碼
-P attribute Add Basic Proxy Authentication, the attributes
are a colon separated username and password.
-X proxy:port 代理服務器
-V 查看 ab 版本
-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
-h Display usage information (this message)