Alexander Lakhin <exclusion@gmail.com> writes:
> I think that deviation can be explained by the fact that cost_index() takes
> baserel->allvisfrac (derived from pg_class.relallvisible) into account for
> the index-only-scan case, and I see the following difference when a test
> run fails:
> relname | relpages | reltuples | relallvisible | indisvalid | autovacuum_count | autoanalyze_count
> ----------------------+----------+-----------+---------------+------------+------------------+-------------------
> - tenk1 | 345 | 10000 | 345 | | 0 | 0
> + tenk1 | 345 | 10000 | 305 | | 0 | 0
Ouch. So what's triggering that? The intention of test_setup
surely is to provide a uniform starting point.
regards, tom lane