ubuntu下 使用AB作壓力測試

1最近剛開始接觸apache大數據下數據優化，講一下apache 下ab壓力測試工具。

程序「ab」還沒有安裝。 您可使用如下命令安裝：

apt-get install apache2-utils   

 如下是ab --help

sage: ab [options] [http[s]://]hostname[:port]/path
Options are:
    -n requests     Number of requests to perform
    -c concurrency  Number of multiple requests to make at a time
    -t timelimit    Seconds to max. to spend on benchmarking
                    This implies -n 50000
    -s timeout      Seconds to max. wait for each response
                    Default is 30 seconds
    -b windowsize   Size of TCP send/receive buffer, in bytes
    -B address      Address to bind to when making outgoing connections
    -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 to use for POST/PUT data, 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.
    -q              Do not show progress when doing more than 150 requests
    -l              Accept variable document length (use this for dynamic pages)
    -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
                    (SSL3, TLS1, TLS1.1, TLS1.2 or ALL)

     -n ：總共的請求執行數，缺省是1；
     -c： 併發數，缺省是1；
     -t：測試所進行的總時間，秒爲單位，缺省50000s
     -p：POST時的數據文件
     -w: 以HTML表的格式輸出結果　　

如下爲執行    ab -n 5000 -c 200 http://localhost/test.php   的結果：

Benchmarking localhost (be patient)
Completed 500 requests
Completed 1000 requests
Completed 1500 requests
Completed 2000 requests
Completed 2500 requests
Completed 3000 requests
Completed 3500 requests
Completed 4000 requests
Completed 4500 requests
Completed 5000 requests
Finished 5000 requests   //執行完的請求次數


Server Software:        Apache/2.4.3     //apache版本
Server Hostname:        localhost        //主機  
Server Port:            80               //端口

Document Path:          /test.php         //路徑
Document Length:        62492 bytes       

Concurrency Level:      200
Time taken for tests:   3.927 seconds       //完成這次請求時間
Complete requests:      5000                //完成請求次數
Failed requests:        527                 //失敗的請求次數
   (Connect: 0, Receive: 0, Length: 527, Exceptions: 0)
Total transferred:      313289422 bytes         //總共傳輸字節
HTML transferred:       312459422 bytes
Requests per second:    1273.33 [#/sec] (mean)   //每秒請求次數
Time per request:       157.069 [ms] (mean)       //一次請求時間
Time per request:       0.785 [ms] (mean, across all concurrent requests)
Transfer rate:          77914.14 [Kbytes/sec] received             //傳輸速率

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    6  73.1      0    1001
Processing:     2  150 143.9    111    1626
Waiting:        2  137 135.3    103    1197
Total:          2  155 160.3    111    1626

Percentage of the requests served within a certain time (ms)
  50%    111
  66%    141
  75%    168
  80%    191
  90%    310
  95%    452
  98%    673
  99%    951
 100%   1626 (longest request)