1、查看某个数据库大小:
select pg_database_size('log_analysis');
2、查看多个数据库大小:
select pg_database.datname, pg_size_pretty (pg_database_size(pg_database.datname)) AS size from pg_database;
3、按顺序查看索引
select indexrelname, pg_size_pretty(pg_relation_size(relid)) from pg_stat_user_indexes where schemaname='public' order by pg_relation_size(relid) desc;
4、查看所有表的大小
select relname, pg_size_pretty(pg_relation_size(relid)) from pg_stat_user_tables where schemaname='public' order by pg_relation_size(relid) desc;