1) I would like to know if the system catalogs tables are created for each database of Postgresql instance or belong to a specific db, such as template0 i suppose.
2) As i had a very large pg_largeogject, i deleted rows e now i have a clean, small table. The table is empty but its index pg_largeogject_loid_pn_index lasts to retain a lot of bytes. How can i do? I have to drop and recreate the index?
