Re: pgsql: Use appropriate wait event when sending data in the apply worker

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От Amit Kapila
Тема Re: pgsql: Use appropriate wait event when sending data in the apply worker
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Msg-id CAA4eK1LTud4FLRbS0QqdZ-pjSxwfFLHC1Dx=6Q7nyROCvvPSfw@mail.gmail.com
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Ответ на Re: pgsql: Use appropriate wait event when sending data in the apply worker  (Robert Haas <robertmhaas@gmail.com>)
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On Thu, Feb 9, 2023 at 7:56 PM Robert Haas <robertmhaas@gmail.com> wrote:
>
> On Mon, Feb 6, 2023 at 11:40 PM Amit Kapila <akapila@postgresql.org> wrote:
> > Use appropriate wait event when sending data in the apply worker.
> >
> > Currently, we reuse WAIT_EVENT_LOGICAL_PARALLEL_APPLY_STATE_CHANGE in the
> > apply worker while sending data to the parallel apply worker via a shared
> > memory queue. This is not appropriate as one won't be able to distinguish
> > whether the worker is waiting for sending data or for the state change.
> >
> > To patch instead uses the wait event WAIT_EVENT_MQ_SEND which has been
> > already used in blocking mode while sending data via a shared memory
> > queue.
>
> This is not right at all. You should invent a new wait state if you're
> waiting in a new place.
>

This is a misunderstanding on my part to reuse the wait_event for a
similar kind of wait but I got your point and will take care of this.

-- 
With Regards,
Amit Kapila.



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