Re: Transaction timeout

On Sat, Dec 23, 2023 at 11:17 AM Japin Li <japinli(at)hotmail(dot)com> wrote:
>
> a
> On Sat, 23 Dec 2023 at 10:40, Japin Li <japinli(at)hotmail(dot)com> wrote:
> > On Sat, 23 Dec 2023 at 08:32, Japin Li <japinli(at)hotmail(dot)com> wrote:
> >> On Fri, 22 Dec 2023 at 23:30, Junwang Zhao <zhjwpku(at)gmail(dot)com> wrote:
> >>> On Fri, Dec 22, 2023 at 10:44 PM Japin Li <japinli(at)hotmail(dot)com> wrote:
> >>>>
> >>>>
> >>>> On Fri, 22 Dec 2023 at 22:37, Junwang Zhao <zhjwpku(at)gmail(dot)com> wrote:
> >>>> > On Fri, Dec 22, 2023 at 10:25 PM Japin Li <japinli(at)hotmail(dot)com> wrote:
> >>>> >> I try to set idle_in_transaction_session_timeout after begin transaction,
> >>>> >> it changes immediately, so I think transaction_timeout should also be take
> >>>> >> immediately.
> >>>> >
> >>>> > Ah, right, idle_in_transaction_session_timeout is set after the set
> >>>> > command finishes and before the backend send *ready for query*
> >>>> > to the client, so the value of the GUC is already set before
> >>>> > next command.
> >>>> >
> >>>>
> >>>> I mean, is it possible to set transaction_timeout before next comand?
> >>>>
> >>> Yeah, it's possible, set transaction_timeout in the when it first
> >>> goes into *idle in transaction* mode, see the attached files.
> >>>
> >>
> >> Thanks for updating the patch, LGTM.
> >
> > Sorry for the noise!
> >
> > Read the previous threads, I find why the author enable transaction_timeout
> > in start_xact_command().
> >
> > The v15 patch cannot handle COMMIT AND CHAIN, see [1]. For example:
> >
> > SET transaction_timeout TO '2s'; BEGIN; SELECT 1, pg_sleep(1); COMMIT AND CHAIN; SELECT 2, pg_sleep(1); COMMIT;
> >
> > The transaction_timeout do not reset when executing COMMIT AND CHAIN.
> >
> > [1] https://www.postgresql.org/message-id/a906dea1-76a1-4f26-76c5-a7efad3ef5b8%40oss.nttdata.com
>
> Attach v16 to solve this. Any suggestions?

I've checked this with *COMMIT AND CHAIN* and *ABORT AND CHAIN*,
both work as expected. Thanks for the update.

>
> --
> Regrads,
> Japin Li
> ChengDu WenWu Information Technology Co., Ltd.
>

--
Regards
Junwang Zhao