nginx memcached
from http://nginx.org/en/docs/http/ngx_http_memcached_module.html#memcached_pass
The ngx_http_memcached_module module allows to obtain responses from a memcached server. The key is set in the $memcached_key variable. A response should be put in memcached in advance via means that are external to nginx. in other words, nginx can only retrieve things already stored in memcache
the means that are external to nginx should most likely be your uwsgi app