Hi again!

I've implemented a Nagios compatible monitor for the MDB freespace, but I'm trying to understand:
The "unused pages" are non-fragmented, obviously
The "free pages" may be scattered all over, but are completely free
May there exist partially free pages that are not accounted in the monitor info?
Also for a huge change request are contiguous pages needed, or is only the number of available pages important?

Does MDB care about fragmentation at all?