Show PostgreSQL current (running) process list;

processlist.sql

SELECT user, pid, client_addr, waiting, query, query_start, NOW() - query_start AS elapsed
FROM pg_stat_activity
WHERE query != '<IDLE>'
-- AND EXTRACT(EPOCH FROM (NOW() - query_start)) > 1
ORDER BY elapsed DESC;

I needed to remove , waiting in PG 14 to make it work because that column wasn't found.

I also don’t have a “waiting” in 13.4 interpretation

SELECT user, pid, client_addr, query, query_start, NOW() - query_start AS elapsed
FROM pg_stat_activity
WHERE query != ''
-- AND EXTRACT(EPOCH FROM (NOW() - query_start)) > 1
ORDER BY elapsed DESC;

I add the update, since the result is visible in google

Improve formatting

SELECT user, pid, client_addr, query, query_start, NOW() - query_start AS elapsed
FROM pg_stat_activity
WHERE query != ''
-- AND EXTRACT(EPOCH FROM (NOW() - query_start)) > 1
ORDER BY elapsed DESC;

you may try this

1. Simple Command

select * from pg_stat_activity;

2. Second Option

SELECT user, pid, client_addr, query, query_start, NOW() - query_start AS elapsed
FROM pg_stat_activity
WHERE query != '<IDLE>'
-- AND EXTRACT(EPOCH FROM (NOW() - query_start)) > 1
ORDER BY elapsed DESC;

3. Third Option

SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

4. Finding Long Processing Time / Stuck Queries

SELECT pid, now() - pg_stat_activity.query_start AS duration, query, state
FROM pg_stat_activity
WHERE (now() - pg_stat_activity.query_start) > interval '5 minutes';

6. Cancelling Long Running Queries

SELECT pg_cancel_backend(pid);

7. Kill Process ID / Terminate Stuck Queries

SELECT pg_terminate_backend(pid);

Ref: SHOW PROCESSLIST IN POSTGRESQL