connect() to unix:/var/run/php-fpm/php.sock failed

[Reinis Rozitis]

> connect() to unix:/var/run/php-fpm/php.sock failed (11: Resource 
> temporarily unavailable) while connecting to upstream

I would suggest you to try switch to tcp - my own experience shows that 
communication (even with little speed gain) between nginx and php via unix 
socket is somehow unreliable especially under load.
You have to tweak the backlog and net.core.somaxconn but for me (at least in 
past) even with high values it still produced some percentage of faulty 
connections.

rr