2、也说缓存 http://blog.joycode.com/peon/archive/2007/09/05/108033.aspx
3、使用memcached进行内存存储 http://www.example.net.cn/archives/2006/01/eoamemcachedoea.html
4、从LiveJournal后台发展看大规模网站性能优化方法http://www.example.net.cn/2006/03/livejournal_optimize_step_by_step.html