Dear Sergei,
Thanks for your prompt response.Yeah it's clear now.
On Thu, Aug 9, 2018 at 1:37 PM, Sergei Kornilov <sk(at)zsrv(dot)org> wrote:
> Hello
> This is documented behavior: https://www.postgresql.org/
> docs/current/static/monitoring-stats.html#PG-STAT-ALL-TABLES-VIEW
> > last_vacuum timestamp with time zone Last time at which this
> table was manually vacuumed (not counting VACUUM FULL)
>
> So, this is not bug.
>
> regards, Sergei
>