Re: A serious change in performance between PG 15 and PG 16, 17, 18.

Clive Boughton <clive.boughton@softimp.com.au> writes:
> When I recently upgraded to PG 18.1 (without any changes to the DB functions or tables, or indexing) it took 7-10
hoursto produce the same result - a 300-600 times decrease in performance. 

This complaint is completely un-actionable for lack of relevant
details.  There are some hints here about describing performance
problems usefully:

https://wiki.postgresql.org/wiki/Slow_Query_Questions

            regards, tom lane