Comment 2 for bug 397721

More Information / Links:

http://interfacelab.com/nginx-php-fpm-apc-awesome/
http://www.yawn.it/2008/04/30/nginx-php-php-fpm-on-debian-etch-40/
http://bookmarks.honewatson.com/2008/11/28/php-fpm-initd-init-script/
http://serverfault.com/questions/44890/php-fpm-nginx-php-cgi-processes-die-after-a-while-in-idle-then-502-bad-gatewa

The second guide mentions you should install X-Cache as it gives a good performance boost. There is an up-to-date packaged version X-Cache ('php5-xcache'). It should be worthy of inclusion here also.