How to know the current cache size using VCL

[David Donchez]

Hi everybody,

I'm setting up a cache system using Varnish and i have a question about VCL.

I want to know what's happen when the cache is full. Is the first object
cached be deleted ?

I want to delete in first, the file with the less hit from the cache (if
the caching going to be full).

Is there a solution using VCL ? or something ?

Thank a lot.