PostgreSQL 查询库中所有表占用磁盘大小、表大小

SELECT
  n.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_size

FROM 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