Report In: 5 Million Requests/Day on a dual-core server

Report in from douban.com:  5 million page requests/day on our  
dedicated Quixote server,  and we just hit the CPU ceiling (30  
process) . We just added one additional server, and will upgrade to  
quad-core Opteron.

We use a linux/mysql/memcached/quixote/scgi/lighttpd stack. Since we  
are a SNS with an extensive recommendation engine, most of the  
requested pages contain multiple types of content classes, and some  
needs heavy personalization (sort, set union, etc)。

Quixote is the most worry-free layer of the stack. Thank you again to  
the Quixote team.

- Bo