Not nice, IMHO. One major problem that prevents the use of apache 2.x for me is the fact that the cache size cannot be constrained. A cache that can grow without constraint can't be used on production systems.
Feel free to submit a patch that efficiently allows the constraint of the cache size. I just don't see a way to do that as mod_disk_cache does not have any indexing.
IMHO, instead of making a false promise, we should remove it. If we were to add such a feature later, we can add such directives accordingly. -- justin
