Deleting from cache by disk usage alone

I have a proxy_cache_path :

proxy_cache_path /local/cache/nginx levels=1:2 keys_zone=cache:10m
inactive=9d max_size=50G;

and also proxy_cache_valid statements:

proxy_cache_valid 200 9d;

I am wondering, however, if there is a way to have:

inactive=infinity in the proxy_cache_path and proxy_cache_valid 200 =
infinity, so that nginx only deletes fcached files based on max_size.

If not, what are the MAX settings for:

inactive and proxy_cache_valid


Thank you,

Posted at Nginx Forum:,13795,13795#msg-13795