502 Bad Gateway Nginx

1、增加children的数量

vi /usr/local/php/etc/php-fpm.conf

pm.max_children = 40

request_terminate_timeout = 100

修改成：

pm.max_children = 400

request_terminate_timeout = 1000

2、增加缓冲区容量

vi /usr/local/nginx/conf/nginx.conf

fastcgi_buffer_size 64k;

fastcgi_buffers 4 64k;

修改成：

fastcgi_buffer_size 128k;

fastcgi_buffers 4 128k;