Postgresql 查询表的大小

桃扇骨 2021-10-06 12:46 506阅读 0赞 
  1. --数据库中单个表的大小（不包含索引）
  2. select pg_size_pretty(pg_relation_size('表名'));
  4. --查出所有表（包含索引）并排序
  5. 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 limit 20 --查出表大小按大小排序并分离data与index 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

转载自 https://www.cnblogs.com/winkey4986/p/6433704.html

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