documentation/postgresql/cli.md

Get list of users and numbers of active connections

SELECT
    datname AS database_name,
    usename AS user_name,
    count(*) AS active_connections
FROM pg_stat_activity
GROUP BY datname, usename order by active_connections DESC;

Limit number of connections for user

alter user keycloak connection limit 80;ALTER ROLE

Remove limit number of connections for user

alter user keycloak connection limit -1;ALTER ROLE

Get replication status

select * from pg_stat_replication;