Lots of CLOSE_WAIT sockets, nginx+php (WordPress site)

[Benjamin Pineau]

Vicente Aguilar a écrit :

> tcp      324      0 10.10.10.10:80        66.249.68.247:36979    
> ESTABLISHED -
> tcp      113      0 127.0.0.1:80            127.0.0.1:39229        
> CLOSE_WAIT  -
> tcp      335      0 10.10.10.10:80        65.55.207.102:47057    
> ESTABLISHED -
> tcp      116      0 10.10.10.10:80        83.170.113.102:60149  
>  ESTABLISHED -
> tcp      413      0 10.10.10.10:80        81.52.143.26:51658    
>  CLOSE_WAIT  -
> tcp      117      0 10.10.10.10:80        83.170.113.102:56117  
>  CLOSE_WAIT  -

Out of curiosity, did you try switching the event module to
anything but the default (epoll) ?
ie. something like:
events {
  use select;
}

The accumulating non-empty Recv-Qs and the pending CLOSE_WAITs (ie.
close() never triggered on server side) behaviors are typical
symptoms for races conditions when using an edge-triggered I/O
interface...