Two cache files with same key

[Roger Fischer]

Hello,

I am using the nginx cache. I observed a MISS when I expected a HIT. When I look at the cache, I see the same page (file) twice in the cache, the original that I expected to HIT on, and the new one from the MISS (that should have been a HIT).

The key, as viewed in the cache file, is exactly the same.

What else, besides the key is considered in determining a hit or miss?

Thanks…

Roger