# db-locks

This command displays queries that have taken out an exclusive lock on a relation. Exclusive locks typically prevent other operations on that relation from taking place, and can be a cause of "hung" queries that are waiting for a lock to be granted.

If you see a query that is hanging for a very long time or causing blocking issues you may consider killing the query by connecting to the database and running `SELECT pg_cancel_backend(PID);` to cancel the query. If the query still does not stop you can force a hard stop by running `SELECT pg_terminate_backend(PID);`

```
     PID   │ RELNAME │ TRANSACTION ID │ GRANTED │                  QUERY                  │   AGE
  ─────────┼─────────┼────────────────┼─────────┼─────────────────────────────────────────┼───────────
    328112 │ null    │              0 │ t       │ SELECT * FROM logs;                     │ 00:04:20
```