压测工具：
简介：
siege官网地址http://www.joedog.org/


安装：
wget http://download.joedog.org/siege/siege-3.0.8.tar.gz
tar xzvf siege-3.0.8.tar.gz
cd siege-3.0.8
./configure
make && make install

[root@zhuiqiuqiji www]# find /  -name 'siege'
/home/yeqing/siege-3.0.8/src/siege
/usr/local/bin/siege


/usr/local/bin/siege -h

准备测试url 或者url列表文件



压测：
  20个用户（每次并发量，注意不是每秒并发量） 重复10次 共产生 20 * 10 = 200个请求  如下：


案例1：
[root@zhuiqiuqiji www]# /home/yeqing/siege-3.0.8/src/siege php ./test.php -b -c20 -r10
** SIEGE 3.0.8
** Preparing 20 concurrent users for battle.
The server is now under siege...
done.

Transactions:                0 hits
Availability:                0.00 %
Elapsed time:                0.13 secs
Data transferred:            0.00 MB
Response time:                0.00 secs
Transaction rate:            0.00 trans/sec
Throughput:                0.00 MB/sec
Concurrency:                0.00
Successful transactions:       0
Failed transactions:            200
Longest transaction:            0.00
Shortest transaction:            0.00

FILE: /usr/local/var/siege.log
You can disable this annoying message by editing
the .siegerc file in your home directory; change
the directive 'show-logfile' to false.

说明：-c是并发量，-r是重复次数。url_list.txt就是一个文本文件，每行都是一个url，它会从里面随机访问的。


案例2：
cat url_list.txt
  curl -d 'name=ye&age=18' www.demo.com/test.php
  curl -d 'name=yeqing&age=18' www.demo.com/test.php

[root@zhuiqiuqiji www]# /usr/local/bin/siege -b -c20 -r10  -f url_list.txt
** SIEGE 3.0.8
** Preparing 20 concurrent users for battle.
The server is now under siege...
done.

Transactions:                   0 hits
Availability:                0.00 %         成功率
Elapsed time:                1.99 secs      总共使用时间
Data transferred:            0.00 MB        共传输数据0MB
Response time:                0.00 secs      响应时间，显示网络连接的速度
Transaction rate:            0.00 trans/sec 平均每秒完成 0 次处理
Throughput:                0.00 MB/sec    平均每秒传送数据
Concurrency:                0.00           实际最高并发连接数
Successful transactions:           0          成功处理次数
Failed transactions:             200           失败处理次数
Longest transaction:            0.00        每次传输所花最长时间
Shortest transaction:            0.00        每次传输所花最短时间

FILE: /usr/local/var/siege.log
You can disable this annoying message by editing
the .siegerc file in your home directory; change
the directive 'show-logfile' to false.

案例3：
  /usr/local/bin/siege -b -c100 -r10  dig www.baidu.com

Lifting the server siege...      done.

Transactions:                 152 hits
Availability:               96.82 %
Elapsed time:              159.40 secs
Data transferred:            4.09 MB
Response time:                4.12 secs
Transaction rate:            0.95 trans/sec
Throughput:                0.03 MB/sec
Concurrency:                3.93
Successful transactions:         152
Failed transactions:               5
Longest transaction:           17.93
Shortest transaction:            0.12

FILE: /usr/local/var/siege.log
You can disable this annoying message by editing
the .siegerc file in your home directory; change
the directive 'show-logfile' to false.