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'orderby 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'orderby pg_relation_size(relid)desc;
5 查看特定表的大小
select relname,pg_size_pretty(pg_relation_size(relid))
from pg_stat_user_tables
where schemaname='public' and relname='【表名】'
order by pg_relation_size(relid) desc;