webbench最多可以模拟3万个并发连接去测试网站的负载能力，个人感觉要比Apache自带的ab压力测试工具好，安装使用也特别方便。
1、适用系统：Linux
2、编译安装：
参数说明：-c表示并发数，-t表示时间(秒)
4、测试结果示例：
引用
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.
Benchmarking: GET \download/2012/10/201210231107032747.jpg
500 clients, running 30 sec.
Speed=3230 pages/min, 11614212 bytes/sec.
Requests: 1615 susceed, 0 failed.
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.
Benchmarking: GET \download/2012/10/201210231107032747.jpg
500 clients, running 30 sec.
Speed=3230 pages/min, 11614212 bytes/sec.
Requests: 1615 susceed, 0 failed.