On 2019-Jan-17, Mariel Cherkassky wrote: > I tried to set the same threshold for the toasted table but got an error > that it is a catalog table and therefore permission is denied. > 2019-01-17 12:04:15 EST db116109 ERROR: permission denied: > "pg_toast_13388392" is a system catalog > 2019-01-17 12:04:15 EST db116109 STATEMENT: alter table > pg_toast.pg_toast_13388392 set (autovacuum_vacuum_scale_factor=0.05); The right way to do this is alter table main_table set (toast.autovacuum_vacuum_scale_factor = 0.05); -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services