K C Lau <kclau60(at)netvigator(dot)com> writes:
> Without knowing the internals, I have this simplistic idea: if Postgres
> maintains the current lowest transaction ID for all active transactions, it
> probably could recycle dead tuples on the fly.
[ yawn... ] Yes, we've heard that before. The hard part is getting rid
of index entries.
regards, tom lane