Increase Nginx Proxy Buffer Size

[mikeschinkel]

I am getting the following in the Nginx logs (because the WordPress site I am debugging for a client is generating tons of cookies):

"upstream sent too big header while reading response header from upstream"

The solution is here, e.g. To add the proxy_buffer_size configurations to the location block:

server {
  listen        80;
  server_name   host.tld;

  location / {
    proxy_pass       http://upstream;
    ...

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