Simon Riggs <simon@2ndquadrant.com> writes:
> This seems to lead to a super-geometric progression in the number of
> files required,
But we double the number of batches at each step, so there are going to
be at most 20 or so levels, and that's only assuming a *horridly* wrong
initial guess by the planner. In practice I think it's reasonable to
assume at most a couple rounds of doubling. If you have more than that,
the extra data-shuffling is going to exhaust your patience anyway.
regards, tom lane