• in php-fpm pool configuration replace listen = /var/run/php5-fpm.sock with listen = 127.0.0.1:7777
  • in /etc/nginx/php_location replace fastcgi_pass unix:/var/run/php5-fpm.sock; with fastcgi_pass 127.0.0.1:7777;

voir https://stackoverflow.com/questions/25097179/warning-pool-www-seems-busy-you-may-need-to-increase-pm-start-servers-or-pm/25098060#25098060

http://stackoverflow.com/questions/10470109/error-502-in-nginx-php5-fpm

http://stackoverflow.com/questions/25098029/connect-to-unix-var-run-php5-fpm-sock-failed-what-is-wrong-with-my-setup

voir pour prestashop aussi :

http://blog.shopapps.co.uk/configure-rewrite-rules-for-nginx/