apache ab工具壓力測試

apache自己自帶了一個測試工具ab，在apache的安裝目錄bin目錄下

ab的使用方法：

Usage： ab [options] [http[s]://]hostname[:port]/path

-n 測試會話中所執行的請求個數，默認時，僅執行一個請求
-c 一次產生的請求個數。默認是一次一個
-t 測試所進行的最大秒數
-v 設置顯示信息的詳細程度 - 4或更大值會顯示頭信息， 3或更大值能夠顯示響應代碼(404, 200等), 2或更大值能夠顯示警告和其餘信息。 -V 顯示版本號zui

最經常使用的參數是 -n 和 -c 例如：

root@:localhost:/usr/local/apache/bin> ./ab -n1000 -c10 http://localhost/index.php
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.90.222 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        Boa/0.94.13
Server Hostname:        192.168.90.222
Server Port:            80

Document Path:          /
Document Length:        41 bytes

Concurrency Level:      10
Time taken for tests:   0.173 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      228000 bytes
HTML transferred:       41000 bytes
Requests per second:    5780.51 [#/sec] (mean)
Time per request:       1.730 [ms] (mean)
Time per request:       0.173 [ms] (mean, across all concurrent requests)
Transfer rate:          1287.07 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.2      0       1
Processing:     0    1   7.8      1      80
Waiting:        0    1   7.3      0      76
Total:          0    2   7.7      1      80

Percentage of the requests served within a certain time (ms)
  50%      1
  66%      1
  75%      1
  80%      1
  90%      1
  95%      1
  98%      2
  99%     76
 100%     80 (longest request)