nginx error_log报错upstream timed out (110: Connection timed out)

最近迁移服务器，在网站搬到新服务器第一天就报504错误，服务器及ip都能ping通，查看错误日志，发现upstream timed out (110: Connection timed out)的错误，上网百度了下，原因应该是nginx配置问题

打开/etc/php5/php-fpm/pool.d/www.conf

将pm.max_children修改为40

request_terminate_time修改为900

再修改php.ini

max_execution_time = 30，把它修改得更长时间

再在/etc/nginx/site-avaiable/虚拟主机名称文件location ~ \.php$ {

}中加上

fastcgi_read_timeout 600;
fastcgi_connect_timeout 600;
fastcgi_send_timeout 600;
fastcgi_buffers 2 256k;
fastcgi_buffer_size 128k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;