Usage with nginx ============= If you are using nginx as a webserver, it will try to buffer the response. So you'll want to disable this with a custom header: .. code-block:: php header('X-Accel-Buffering: no'); # or with the Response class from Symfony $response->headers->set('X-Accel-Buffering', 'no'); Alternatively, you can tweak the `fastcgi cache parameters `_ within nginx config. See `original issue `_.