Upstream too big – nginx + codeigniter

Add this to your http {} of the nginx.conf file normally located at /etc/nginx/nginx.conf: proxy_buffer_size 128k; proxy_buffers 4 256k; proxy_busy_buffers_size 256k; Then add this to your php location block, this will be located in your vhost file look for the block that begins with location ~ .php$ { fastcgi_buffer_size 128k; fastcgi_buffers 4 256k; fastcgi_busy_buffers_size 256k;