stats INT is too small

[dmorton]

It quite conceivable for size stats to exceed 2 GB in today's world. We need to change all INT's to BIGINT's.

[rjl]

The best way to solve the problem is ultimately to change the way averages are computed, i.e. a different algorithm. Right now we're storing the total size and the total count, and just dividing the total size by the total count to get the average. A better solution might store the total count and the average size itself, and not the total size at all (total size can always be obtained by multiplying total count by average size, after all).

[jleaver]

I'm changing this to the amavisd-maia component, as that's where the proposed change must take place.

[dmorton]

Database schema changes deferred to 1.1