[PostgreSQL] 데이터베이스 연결 수 확인 쿼리

[PostgreSQL] 데이터베이스 연결 수 확인 쿼리

 

select  * from
(select count(*) used from pg_stat_activity) q1,
(select setting::int res_for_super from pg_settings where name=$$superuser_reserved_connections$$) q2,
(select setting::int max_conn from pg_settings where name=$$max_connections$$) q3;