On Wed, Apr 05, 2023 at 12:37:41PM +0530, Karthik Krishnakumar wrote: > Is there a limit to number of tables that a cluster can support? Well, yes. For starters: https://www.postgresql.org/docs/current/limits.html But more important is: with large number of tables certain operations become VERY slow. Specifically getting schema dump. Which is used, for example, by pg_upgrade. In my experience hitting 1 million rows in pg_class made it realistically impossible to use pg_dump. But there have been many improvements to pg_dump over the years (https://why-upgrade.depesz.com/show?from=9.5&to=15.2&keywords=pg_dump) to it's possible that the problem is gone now. Try taking `pg_dump -s` of the db, and see how long it takes... Best regards, depesz
