在Postgres數據庫中查找增加更新的表源代碼

Question

我監視的Postgres數據庫之一正在被大量更新所淹沒。 Postgres中最好的方法是，在我的實例中輕鬆識別哪些表或多個表獲取這些DML請求的大部分？

Answer 1

你可以使用pg_stat_all_tables它，就像這裏：

t=# create table t19 (i int); 
CREATE TABLE 
t=# insert into t19 select 1; 
INSERT 0 1 
t=# select schemaname,relname,n_tup_upd from pg_stat_all_tables order by n_tup_upd desc limit 2; 
schemaname |  relname  | n_tup_upd 
------------+-----------------+----------- 
pg_catalog | pg_operator  |   0 
pg_catalog | pg_auth_members |   0 
(2 rows) 

t=# update t19 set i=2; 
UPDATE 1 
t=# update t19 set i=2; 
UPDATE 1 
t=# select schemaname,relname,n_tup_upd from pg_stat_all_tables order by n_tup_upd desc limit 2; 
schemaname | relname | n_tup_upd 
------------+-------------+----------- 
public  | t19   |   2 
pg_catalog | pg_operator |   0 
(2 rows)