PHP-FPM : get status information page for monitoring
To be able to monitor the PHP-FPM service with connections, queue information, process… you’ll need to set the status page. This will give you something like this :
pool: www process manager: dynamic start time: 18/Dec/2013:19:00:41 +0100 start since: 52972 accepted conn: 5268 listen queue: 0 max listen queue: 0 listen queue len: 0 idle processes: 3 active processes: 1 total processes: 4 max active processes: 4 max children reached: 0
Those informations are important to correctly tune the PHP-FPM service. To add it with Nginx, you can follow my tutorial (french).