RE Tom: If you check my query I have subtracted state_change timestamp that is returned by pg_stat_activity, and according to my knowledge state_change returns the last time the state got changed for the session, and if it's saying 28 minutes then I suppose this means from 28 minutes the session did not change state from idle. About you second "how" question, I set the timeout in postgresql.conf file and didn't do it directly in the session. I will double check if I made this mistake or not but I remember that I changed the config and then restarted PostgreSQL service and then checked if the timeouts got set by querying from them, only then I started my queries. But I will try it again for making sure that what you said might be the problem
Hi David,
PostgreSQL does create and maintain connections on request because it is “expensive” to create new connections. Wouldn’t possible in your case to control the idle connections from the apps requesting connections? Things like reducing app thread pool? PostgreSQL ignore (rightfully) some of the configs even if it is set.
Regards,
Emile
> On 29 Aug 2023, at 23:46, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> "David G. Johnston" <david.g.johnston@gmail.com> writes:
>> On Tuesday, August 29, 2023, PG Bug reporting form <noreply@postgresql.org>
>> wrote:
>>> I have set the idle_session_timeout variable as 60000 making it 60 seconds
>>> As we can see, it shows that the time is way more than 1 minute now it is
>>> 28 minutes and they are still idle and still open in postgres and not
>>> disconnected as expected.
>
>> Not sure how you got 28 minutes from 45748…which is large enough that it is
>> probable those sessions started before you changed the timeout and so are
>> not affected by it.
>
> I believe idle_session_timeout is consulted when the session goes
> idle, and we either set a timeout interrupt or not. The prevailing
> value might change after that, but it won't affect existing sessions
> until they next go idle. I do not regard that as a bug.
>
> Also, the OP didn't say *how* he set idle_session_timeout. That
> pg_settings extract only proves that 60000 is the prevailing value in
> the session where that was done. It's possible that the value was
> only set locally, or in some other way that didn't affect those other
> sessions at all.
>
> regards, tom lane
>
>
