Re: Terminate the idle sessions

On Monday, November 16, 2020, Li Japin <japinli(at)hotmail(dot)com> wrote:

>
> <note>
> Consider setting this for specific users instead of as a server default.
> Client connections managed by connection poolers, or initiated indirectly
> like those by a remote postgres_fdw using server, should probably be
> excluded from this timeout.
>
> <note>
>
> <para>
> - This parameter should be set to zero if you use postgres_fdw or
> some
> - connection-pooling software, because connections might be closed
> unexpectedly.
> + This parameter should be set to zero if you use some
> connection-pooling software, or
> + PostgreSQL servers used by postgres_fdw, because connections
> might be closed unexpectedly.
> </para>
> </note>
>
>
Prefer mine, “or pg servers used by postgres_fdw”, doesn’t flow.

> Could you please explain how the idle-in-transaction interfere the
> long-running stability?
>

From the docs (next section):

This allows any locks held by that session to be released and the
connection slot to be reused; it also allows tuples visible only to this
transaction to be vacuumed. See Section 24.1
<https://www.postgresql.org/docs/13/routine-vacuuming.html> for more
details about this.

David J.