nginx fine cache tuning

cache_fine_tuning_example.conf

proxy_cache_path /path/to/cache levels=1:2 keys_zone=my_cache:10m max_size=10g
                 inactive=60m use_temp_path=off;

server {
    ...
    location / {
        proxy_cache my_cache;
        proxy_cache_revalidate on;
        proxy_cache_min_uses 1;
        proxy_cache_use_stale error timeout updating http_500 http_502 http_503 
                              http_504;
        proxy_cache_lock on;

        proxy_pass http://my_upstream;
    }
}