apt-get install apache2-utils
ab -n 100 -c 10 http://47.99.37.122:8100/blogs
n为总数，c为并发数
webbench压测
wget http://soft.vpser.net/test/webbench/webbench-1.5.tar.gz
tar zxvf webbench-1.5.tar.gz
make && make install
webbench -c 20000 -t 130 http://47.99.37.122:8100/blogs
c为总数，t为持续时间