PostgreSQL 查询库中所有表占用磁盘大小、表大小

SELECTn.nspname AS schema_name,c.relname AS table_name,-- 1️⃣ 总大小（表 + toast + 索引）pg_size_pretty(pg_total_relation_size(c.oid)) AS total_size,-- 2️⃣ 表不包含索引（含 TOAST）pg_size_pretty(pg_total_relation_size(c.oid) - pg_indexes_size(c.oid)) AS without_index_size,-- 3️⃣ 仅表本体（不含 TOAST、不含索引）pg_size_pretty(pg_relation_size(c.oid)) AS table_only_size,-- 4️⃣ 索引大小（不含 TOAST）pg_size_pretty(pg_indexes_size(c.oid)) AS index_sizeFROM pg_class c
JOIN pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind = 'r'  -- 普通表AND n.nspname NOT IN ('pg_catalog', 'information_schema')
--	AND  c.relname  = 'appraisal_history_sales'
ORDER BY pg_total_relation_size(c.oid) DESC;

返回结果