On Mon, 9 Mar 2020 at 09:58, Julien Rouhaud <rjuju123(at)gmail(dot)com> wrote:
> The query displayed is just the query currently executing, but if the
> connection is in a transaction the problematic lock could have been
> acquired by
> any previously executed query. Did you check in pg_stat_activity if the
> connection is in a transaction (e.g. query_start != xact_start)?
>
Oh, I see. Thank you. I modified query from wiki and it shows that blocking
session actually runs for ~12 hours already. Only last COPY command started
recently. So maybe golang library did not close session properly and reused
it in another completely different task? Although I defer db.Close()
everywhere...