PG数据库空间大小及数据库对象占用空间大小

select pg_size_pretty(pg_database_size('lrisk')); --查询数据库剩余空间

select pg_database.datname,pg_size_pretty(pg_database_size('lrisk')) AS size
from pg_database;

select * from pg_database;

SELECT relname, relpages FROM pg_class ORDER BY relpages DESC; --查询数据库对象占用空间从大到小排序