Com base na resposta do @Anshu que estou usando:
SELECT datname, pid, state, query, age(clock_timestamp(), query_start) AS age
FROM pg_stat_activity
WHERE state <> 'idle'
AND query NOT LIKE '% FROM pg_stat_activity %'
ORDER BY age;
SELECT datname, pid, state, query, age(clock_timestamp(), query_start) AS age
FROM pg_stat_activity
WHERE state <> 'idle'
AND query NOT LIKE '% FROM pg_stat_activity %'
ORDER BY age;