1.安装
安装包下载地址：
将 httpd-2.2.29.tar.gz 解压到目录 /apps/install/httpd-2.2.29 ，这是我放置的位置
cd /apps/install/httpd-2.2.29
./configure
make
make install
ok ,没有 error 就表示安装成功了，上面我并没有改变他的编译目录，默认的编译目录在
/usr/local/apache2/bin
如果找不到了，搜索呗
find . -name httpd
2.测试
进入 /usr/local/apache2/bin
cd /usr/local/apache2/bin
./ab -n 300 -c 300 http://www.baidu.com/
执行 300次，每次并发 300个请求 www.baidu.com
./ab -n 3000 -c 3000 http://www.test.com/
其中-n代表每次并发量，-c代表总共发送的数量
3.测试结果说明
[root@Svr107 bin]# ./ab -n -c http://www.test.com/
This is ApacheBench, Version 2.3 <$Revision: $>
Copyright Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking www.twioo.com (be patient)
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Finished requests Server Software: nginx/0.7.
Server Hostname: www.test.com
Server Port: Document Path: / ###请求的资源
Document Length: bytes ###文档返回的长度，不包括相应头 Concurrency Level: ###并发个数
Time taken for tests: 30.449 seconds ###总请求时间
Complete requests: ###总请求数
Failed requests: ###失败的请求数
Write errors:
Total transferred: bytes
HTML transferred: bytes
Requests per second: 98.52 [#/sec] (mean) ###平均每秒的请求数
Time per request: 30449.217 [ms] (mean) ###平均每个请求消耗的时间
Time per request: 10.150 [ms] (mean, across all concurrent requests) ###上面的请求除以并发数
Transfer rate: 4898.81 [Kbytes/sec] received ###传输速率 Connection Times (ms)
min mean[+/-sd] median max
Connect: 27.1
Processing: 5196.8
Waiting: 5432.8
Total: 5210.5 Percentage of the requests served within a certain time (ms)
% ###%的请求都在7778Ms内完成
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% (longest request)