On 5/28/21 2:48 PM, Dean Gibson (DB Administrator) wrote:
What sticks out for me are these two scans, which balloon from 50-60
heap fetches to 1.5M each.
> -> Nested Loop (cost=0.29..0.68 rows=1 width=7)
> (actual time=0.003..0.004 rows=1 loops=1487153)
> Join Filter: ("_IsoCountry".iso_alpha2 =
> "_Territory".country_id)
> Rows Removed by Join Filter: 0
> -> Index Only Scan using
> "_IsoCountry_iso_alpha2_key" on "_IsoCountry" (cost=0.14..0.38 rows=1
> width=3) (actual time=0.001..0.002 rows=1 loops=1487153)
> Index Cond: (iso_alpha2 =
> "_GovtRegion".country_id)
> Heap Fetches: 1487153
> -> Index Only Scan using "_Territory_pkey"
> on "_Territory" (cost=0.14..0.29 rows=1 width=7) (actual
> time=0.001..0.001 rows=1 loops=1487153)
> Index Cond: (territory_id =
> "_GovtRegion".territory_id)
> Heap Fetches: 1550706
How did you load the database? pg_dump -> psql/pg_restore?
If so, did you perform a VACUUM FREEZE after the load?
Regards, Jan
--
Jan Wieck
Postgres User since 1994