mac lion 下面如何让ab 生效

This is due to a bug in the Apache software that's bundled with Lion. A more recent version of Apache (beta) fixes the problem. To fix ab, here are the steps:

1. Download the latest version of Apache

   $ wget http://apache.mirrors.pair.com//httpd/httpd-2.3.16-beta.tar.bz2
   

If 2.3.16 is not available, go to http://apache.mirrors.pair.com/httpd and get the latest

1. Install pcre (you need brew for this)

   $ brew install pcre
   

2. Build Apache

   $ tar xzvf httpd-2.3.16-beta.tar.bz2
   $ cd httpd-2.3.16-beta
   $ ./configure
   $ make
   

3. Overwrite the existing ab with the newly built one

   $ sudo cp support/ab /usr/sbin