I check the running queries with the following SQL:
SELECT procpid, start, now() - start AS lap, current_query FROM (SELECT backendid, pg_stat_get_backend_pid(S.backendid) AS procpid, pg_stat_get_backend_activity_start(S.backendid) AS start, pg_stat_get_backend_activity(S.backendid) AS current_query FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS S ) AS S WHERE current_query <> '<IDLE>' ORDER BY lap DESC;
I think so this query is weird - probably this query was finished
you should to use constraint
WHERE state <> 'idle';
Regards
Pavel
Then, I found a SQL that has run for some days (and still running):
procpid | 32638 start | 2019-11-25 16:29:29.529318+08 lap | 21 days 18:24:54.707369 current_query | DEALLOCATE pdo_stmt_00000388
I tried to kill it with: SELECT pg_cancel_backend(32638) but it takes no effects.