apache自带的ab输出结果说明

ab -n 200 -c 10 http://www.baidu.com/

默认使用http1.0协议，但是可以支持keepalive

-k              Use HTTP KeepAlive feature

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结果如下

 
    
      Benchmarking www.baidu.com (be patient)
 
    
      Completed 100 requests Finished 200 requests 
     Server Software:        BWS/1.0
 
    
      Server Hostname:        www.baidu.com Server
 
    
      Port:            80 
     Document Path:          /
 
    
      Document Length:        8024 bytes
 
     
     # 请求的文件的大小 
     Concurrency Level:      10
 
     
     # 并发用户数 
     Time taken for tests:   31.38024 seconds
 
     
     # 所有请求被处理完成所话费的总时间 
     Complete requests:      200
 
    
      Failed requests:        0
 
    
      Write errors:           0
 
    
      Total transferred:      1690800 bytes
 
     
     # 所有请求的响应数据长度总和，含头和正文数据长度。注意不包括HTTP请求数据的长度 
     HTML transferred:       1612872 bytes
 
     
     # 所有请求的响应数据中正文数据的总和。也就是没有头. 
     Requests per second:    6.44 [#/sec] (mean)
 
     
     # 吞吐率 
     Time per request:       1551.901 [ms] (mean)
 
     
     # 用户平均请求等待时间 
     Time per request:       155.190 [ms] (mean, across all concurrent requests)
 
     
     # 服务器平均请求处理时间,吞吐率的倒数 Time taken for tests/Complete requests 
     Transfer rate:          53.19 [Kbytes/sec] received
 
     
     # 单位时间内响应的数据量 
     Connection Times (ms) 
                    min  mean[+/-sd] median   max 
     Connect:        3  441 717.2    287    3329
 
    
      Processing:   115 1008 905.0    720    4563
 
    
      Waiting:        4  301 130.3    298     881
 
    
      Total:        118 1449 1227.4   1045    7702
 
     
     Percentage of the requests served within a certain time (ms)
 
     
     # 每个请求处理时间的分布 
     50%   1045
 
    
      66%   1394
 
    
      75%   1710
 
    
      80%   1863
 
    
      90%   3171
 
    
      95%   4336
 
    
      98%   4919
 
    
      99%   7610
 
    
      100%   7702 (longest request)