一、http_load

     http_load以并行复用的方式运行，用以测试web服务器的吞吐量与负载。但是它不同于大多数压力测试工具，它可以以一个单

一的进程运行，一般不会把客户机搞死。还可以测试HTTPS类的网站请求。
   #wget http://www.acme.com/software/http_load/http_load-12mar2006.tar.gz
   #tar zxvf http_load-12mar2006.tar.gz
   #cd http_load-12mar2006
   #make && make install
   #http_load -p并发访问进程数 -f总计的访问次数 -r每秒的访问频率 -s访问时间  需要访问的url文件
   #echo "http://192.168.1.101/test.php" >1.txt
   #http_load -p 30 -s 60 1.txt
      7751 fetches, 30 max parallel, 2.9119e+08 bytes, in 60.0024 seconds
      37568 mean bytes/connection
      129.178 fetches/sec, 4.85297e+06 bytes/sec
      msecs/connect: 77.8017 mean, 3050.89 max, 30.308 min
      msecs/first-response: 50.3716 mean, 9148.3 max, 31.205 min
      HTTP response codes:code 200 -- 7751                说明打开响应页面的类型
  
   http://www.acme.com/software这个网站上有很多小工具:http_ping、http_get、http_post
      还有一个secure HTTP server:thttpd
     http://selboo.com.cn/post/596/

二、webbench

        #wget http://blog.s135.com/soft/linux/webbench/webbench-1.5.tar.gz
        #tar zvxf webbench-1.5.tar.gz
        #cd webbench-1.5
        #make && make install
        webbench -c 并发数 -t 运行测试时间 url
        #webbench -c 5000 -t 30 http://192.168.1.101/test.php
        http://selboo.com.cn/post/424/

三、ab

    ab是apache自带的一款功能强大的测试工具,一般安装apache就默认安装的
    #/usr/local/apache/bin/ab -c 100 -n 100 http://192.168.1.101/test.php  
    -c -n 是常用的两个
       This is ApacheBench, Version 2.3 <$Revision: 655654 $>
       Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
       Licensed to The Apache Software Foundation, http://www.apache.org/

       Benchmarking 192.168.1.101 (be patient).....done


       Server Software:        Apache/2.2.3
       Server Hostname:        192.168.8.201
       Server Port:            80

       Document Path:          /1.php
       Document Length:        37752 bytes

       Concurrency Level:      100
       Time taken for tests:   0.908 seconds
       Complete requests:      100
       Failed requests:        0
       Write errors:           0
       Total transferred:      3923458 bytes
       HTML transferred:       3905226 bytes
       Requests per second:    110.11 [#/sec] (mean)
       Time per request:       908.165 [ms] (mean)
       Time per request:       9.082 [ms] (mean, across all concurrent requests)
       Transfer rate:          4218.95 [Kbytes/sec] received

       Connection Times (ms)
              min  mean[+/-sd] median   max
       Connect:       34   34   1.8     34      42
       Processing:   109  519 246.1    474     868
       Waiting:       35   78  61.8     56     285
       Total:        151  553 245.5    508     901

       Percentage of the requests served within a certain time (ms)
         50%    508
         66%    797
         75%    814
         80%    840
         90%    883
         95%    883
         98%    901
         99%    901
        100%    901 (longest request)

四、Siege

    一款开源的压力测试工具，可以根据配置对一个WEB站点进行多用户的并发访问，记录每个用户所有请求过程的相应时间，并在一定数量的并发访问下重复进行。
      #wget ftp://ftp.joedog.org/pub/siege/siege-latest.tar.gz
      #tar zvxf siege-latest.tar.gz
      #cd siege-latest
      #./configure && make && make install
      #siege -c 100 -r 100 http://192.168.1.101/test.php
       Transactions:                  10000 hits  1w点击率
       Availability:                 100.00 %     成功率
       Elapsed time:                  90.29 secs  总共用时
       Data transferred:             365.56 MB    总共数据的传输
       Response time:                  0.21 secs  显示网络连接的速度
       Transaction rate:             110.75 trans/sec每秒完成处理次数
       Throughput:                     4.05 MB/sec 平均每秒传送数据
       Concurrency:                   23.61        最高并发量
       Successful transactions:       10000        成功次数
       Failed transactions:               0        失败次数
       Longest transaction:           14.70        每次传输所花最长时间
       Shortest transaction:           0.12        每次传输所花最短时间