On 4/7/25 12:25, Simon Windsor wrote:
Hi
We used pg_dump|pg_restore to migrate the data.
Did you do an ANALYZE on the Postgres 16 instance after the pg_restore?
The full explain plan is at https://explain.depesz.com/s/742M. The SQL
explain (analyze, buffers) select count(*) from consignments where
(req_status_tstamp >= '2025-03-28 00:00'::timestamp and
req_status_tstamp <= '2025-03-28 01:00'::timestamp);
takes 2-3s with the old Pg13 DB, and over a minute with Pg16
Do you have an EXPLAIN ANALYZE for the Postgres 13 case?
After spending many hours looking at DB settings and Statistic settings
I am at a loss/
Simon
--
Adrian Klaver
adrian.kla...@aklaver.com
