Hi Maxim

Let me explain the use case.
I am using cache module to serve very large library. Some files are very popular but a ot of them are not popular at all though. To deal with this long tail I use proxy_cache_min_uses to cache only after it was requested several times. So what I think happens is that disk is not a limiting factor (at least not enough) but keys zone grows very quickly.

Thanks,
Kuba