> What currently can be used for such a use case is "inactive="
> parameter of the proxy_cache_path directive (see
> http://nginx.org/r/proxy_cache_path). It ensures that items not
> recently requested are removed from the cache, including ones
> created with proxy_cache_min_uses. Have you tried tuning it?

Hi Maxim

Thank you for your response.
Yes, that is what I do - try to keep balance between inactive time (which I obviously want to keep as high as possible) and the keys zone size. But this is constant/never-ending effort if the traffic pattern is changing (and it unfortunately is for me...). It would be great if nginx used keys size as an additional trigger to forced_expire resources - to auto-adjust the removal aggression when the traffic profile changes.

Regards,
Kuba