Mostrando tamanho das tabelas no Postgre

Mostrando tamanho das tabelas no Postgre

Para mostrar o tamanho das tabelas no Postgre:

SELECT
    schema_name,
    relname,
    pg_size_pretty(table_size) AS SIZE,
    table_size
FROM 
    (
        SELECT
            pg_catalog.pg_namespace.nspname AS schema_name,
            relname,
            pg_relation_size(pg_catalog.pg_class.oid) AS table_size
 
        FROM 
            pg_catalog.pg_class
            JOIN pg_catalog.pg_namespace ON relnamespace = pg_catalog.pg_namespace.oid
    ) t
WHERE 
    schema_name NOT LIKE 'pg_%'
ORDER BY 
    table_size DESC
;