Re: Commit with wait event on advisory lock!

Advisory locks are used by developers

On Tue, 21 Jan 2025, 20:18 , <msalais(at)msym(dot)fr> wrote:

> Hi all,
>
>
>
> I have long commits on a production database. To know why this happens I
> organized a snapshot system on table pg_stat_activity.
>
> When I check the result I have this row in it:
>
>
>
> postgres=# select * from public.fdj_ms_slow_stmts where pid = 2285947 \gx
>
> -[ RECORD 1
> ]----+-----------------------------------------------------------------------------------------------------------------------
>
> datname | some_db
>
> pid | 2285947
>
> leader_pid |
>
> usename | some_user
>
> application_name | PostgreSQL JDBC Driver
>
> backend_start | 2025-01-21 04:25:17.254477+01
>
> xact_start | 2025-01-21 05:55:19.426945+01
>
> query_start | 2025-01-21 05:55:19.428651+01
>
> stmt_duration | 00:00:02.140691
>
> tx_idle_duration | 00:00:00
>
> ts_now | 2025-01-21 05:55:21.569342+01
>
> state | active
>
> wait_event_type | *Lock*
>
> wait_event | *advisory*
>
> query_id |
>
> query | *COMMIT*
>
> …
>
>
>
> Is this possible ?
>
> I am really surprised !
>
>
>
> *Michel SALAIS*
>