Tuning your wordpress site for speed with a very fast nginx web server.
The path for fastcgi_cache, client_body_temp_path are using the fast tmpfs in RAM under /run.
To create these directories on server startup:
d /run/nginx 0775 root root - - d /run/nginx-tmp 0775 root root - -
Also /var/run is a link to /run in most distributions.