"scott.marlowe" <scott(dot)marlowe(at)ihs(dot)com> writes:
> Also, full vacuums are required every so often to keep the transaction id
> from rolling over.
Not so; a plain vacuum is fine for that. The critical point is that
*every* table in *every* database has to be vacuumed (plain or full)
at least once every billion transactions or so.
regards, tom lane