ab相同并发的情况下，不同请求次数，响应速度不一机的奇怪问题。 400 请求报错 

小弟最近做了这样一个测试： ab -n 100000 -c 400 192.168.3.130/ Server Software:        Apache/2.2.21 Server Hostname:        192.168.3.130 Server Port:            80 Document Path:          / Document Length:        44 bytes Concurrency Level:      400 Time taken for tests:   7.321617 seconds Complete requests:      100000 Failed requests:        0 Write errors:           0 Total transferred:      29514160 bytes HTML transferred:       4402112 bytes Requests per second:    13658.18 [#/sec] (mean) Time per request:       29.286 [ms] (mean) Time per request:       0.073 [ms] (mean, across all concurrent requests) Transfer rate:          3936.56 [Kbytes/sec] received ab -n 1000000 -c 400 192.168.3.130/ Concurrency Level:      400 Time taken for tests:   51.276322 seconds Complete requests:      1000000 Failed requests:        0 Write errors:           0 Total transferred:      295024190 bytes HTML transferred:       44003608 bytes Requests per second:    19502.18 [#/sec] (mean) Time per request:       20.511 [ms] (mean) Time per request:       0.051 [ms] (mean, across all concurrent requests) Transfer rate:          5618.75 [Kbytes/sec] received 同样的一台目标服务器，同样是400并发，为什么10000次请求的情况下是13000多每秒，100000次请求就变成19000多每秒了，各位高手，谁知道是为什么啊？