- 查看數據庫物理大小
select pg_size_pretty(pg_database_size('庫'));
- 查看所有數據庫大小
select datname,pg_size_pretty(pg_database_size(datname)) from pg_database;
- 查看錶大小:
select pg_size_pretty(pg_relation_size('表'));
- 查看錶和索引大小
select pg_size_pretty(pg_total_relation_size('表'));
- 檢查表的數據是否均勻存放
select gp_segment_id,count(*) from 表 group by gp_segment_id;
-
正在執行的sql(可以配置日誌的時候,打印慢查詢,但是和正常日誌衝突)
select current_query,query_start from pg_stat_activity ORDER BY query_start;