Re: Obsolete or dead serverconnections after reboot

Hello Ninad Shah,

I think, nobody holds the connections, because the state is idle. But
I'm not shure what means: the connection is idle.

One interesting fact was: when I dont stop the psql commandline on the
client (and dont start another query, wht ends up in a connection reset,
while the server is down), psql uses the same connection after reboot
and the state goes from idle back to active.

So there are two questions: what will happen to idle connctions after a
while, if the client doesnt exist anymore.
And is this desired behavior, the the postgres-Server-Service does not a
shutdown on reboot on windows. (seem my mail to Vijaykumar Jain)

Thanks you, Greeting from germany,
Wolfgang

Am 21.07.2021 um 16:10 schrieb Ninad Shah:
> Hello,
>
> Would you be able to verify the process trees for those PIDs on Windows?
> You may be able to see who holds the connections?
>
>
> Regards,
> Ninad Shah
>
> On Wed, 21 Jul 2021 at 19:15, WR <wolle321(at)freenet(dot)de
> <mailto:wolle321(at)freenet(dot)de>> wrote:
>
> Hello Vijaykumar Jain,
>
> thank you for fast answer, today I'm not able to access the hardware,
> I'll be back tomorrow and will do the required tests.
>
> Wolfgang
>
> Am 21.07.2021 um 15:14 schrieb Vijaykumar Jain:
> > select pg_stat_reset();
> >
> > Can you run above function, to check if stats are reset and
> things are
> > fine without a pg restart?
> > I not able to understand how new connection stats are added,
> along with
> > old stale states, if I assume stats collector process is having
> issues ,
> > or the stats folder is corrupt etc.
> > That would also mean, all table stats would be off or not updated
> too?
> > Is that so? Or analyse works fine on tables without a restart?
> >
> > On Wed, Jul 21, 2021, 6:27 PM Vijaykumar Jain
> > <vijaykumarjain(dot)github(at)gmail(dot)com
> <mailto:vijaykumarjain(dot)github(at)gmail(dot)com>
> > <mailto:vijaykumarjain(dot)github(at)gmail(dot)com
> <mailto:vijaykumarjain(dot)github(at)gmail(dot)com>>> wrote:
> >
> >
> >
> >         Is there a way to avoid this (without restarting the service
> >         after every
> >         reboot). Is this a bug or a normal behavior?
> >
> >
> >     I have less knowledge of windows.
> > https://www.enterprisedb.com/blog/postgresql-shutdown
> <https://www.enterprisedb.com/blog/postgresql-shutdown>
> >     <https://www.enterprisedb.com/blog/postgresql-shutdown
> <https://www.enterprisedb.com/blog/postgresql-shutdown>>
> >
> >
> >
> >     Do you see shutdown/termination messages in the db logs or
> windows
> >     event logs when the machine is rebooted?
> >
> >     You get the same pid and query, does it also has the same
> age( time
> >     since it started),
> >     I mean is the stats table updated with new data for stale
> >     connections or they remain static.
> >
> >     Do you see the same issue when the machine is power cycled.
> >
> >     Maybe windows might be preserving the memory state on disk and
> >     reading it back on reboot (like sleep) unless there are
> instructions
> >     to shutdown the db server on reboot. Idk.
> >
> >     What are the state of the connections in pg_stat_activity abd
> >     process explorer before and after reboot. The sockets exists and
> >     active,  or are residual in pg stats only.
> >
> >
>
>
>

--
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