Wypróbuj funkcje rozmiaru obiektu bazy danych. Przykład:
SELECT pg_size_pretty(pg_total_relation_size('"<schema>"."<table>"'));
Dla wszystkich tabel coś w stylu:
SELECT
table_schema || '.' || table_name AS table_full_name,
pg_size_pretty(pg_total_relation_size('"' || table_schema || '"."' || table_name || '"')) AS size
FROM information_schema.tables
ORDER BY
pg_total_relation_size('"' || table_schema || '"."' || table_name || '"') DESC;
Edycja:Oto zapytanie przesłane przez @phord, dla wygody:
SELECT
table_name,
pg_size_pretty(table_size) AS table_size,
pg_size_pretty(indexes_size) AS indexes_size,
pg_size_pretty(total_size) AS total_size
FROM (
SELECT
table_name,
pg_table_size(table_name) AS table_size,
pg_indexes_size(table_name) AS indexes_size,
pg_total_relation_size(table_name) AS total_size
FROM (
SELECT ('"' || table_schema || '"."' || table_name || '"') AS table_name
FROM information_schema.tables
) AS all_tables
ORDER BY total_size DESC
) AS pretty_sizes;
Zmodyfikowałem go nieco, aby używać pg_table_size()
aby dołączyć metadane i dodać rozmiary.