Greg Stark <gsstark@mit.edu> writes:
> The exact same data. I just copied the data using pg_dumpall to do the upgrade
> and haven't updated either database at all since. The analyze stats should be
> pretty up-to-date but in any case should be the same for both assuming they
> get copied in the dump as well.
Uh, no, pg_dump doesn't copy pg_statistic; you must do a fresh ANALYZE
after loading the dump file.
regards, tom lane