Upstream too big - nginx + codeigniter

Solution 1:

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;

Solution 2:

Modify your nginx configuration and change/set the following directives:

    proxy_buffer_size   128k;
    proxy_buffers   4 256k;
    proxy_busy_buffers_size   256k;