pg 查看表和索引大小

SELECT
pg_size_pretty(pg_total_relation_size(c.oid)) AS total_size,
pg_size_pretty(pg_indexes_size(c.oid)) AS index_size,
pg_size_pretty(pg_total_relation_size(c.oid) - pg_indexes_size(c.oid)) AS data_size,
nspname AS schema_name,
relname AS table_name
FROM
pg_class c
LEFT JOIN
pg_namespace n ON n.oid = c.relnamespace
WHERE
relkind = 'r'
AND nspname NOT LIKE 'pg_%'
AND nspname != 'information_schema'
ORDER BY
pg_total_relation_size(c.oid) DESC;