Re: Time delayed LR (WAS Re: logical replication restrictions)

From: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
To: Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>
Cc: osumi(dot)takamichi(at)fujitsu(dot)com, smithpb2250(at)gmail(dot)com, vignesh21(at)gmail(dot)com, kuroda(dot)hayato(at)fujitsu(dot)com, shveta(dot)malik(at)gmail(dot)com, dilipbalaut(at)gmail(dot)com, euler(at)eulerto(dot)com, m(dot)melihmutlu(at)gmail(dot)com, andres(at)anarazel(dot)de, marcos(at)f10(dot)com(dot)br, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Time delayed LR (WAS Re: logical replication restrictions)
Date: 2023-01-30 03:21:05
Message-ID: CAA4eK1K_iKpmhDg+gwpz9rjEauBRBtj-_vp1D0e6K6WP4DpsoQ@mail.gmail.com
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On Mon, Jan 30, 2023 at 8:32 AM Kyotaro Horiguchi
<horikyota(dot)ntt(at)gmail(dot)com> wrote:
>
> At Sat, 28 Jan 2023 04:28:29 +0000, "Takamichi Osumi (Fujitsu)" <osumi(dot)takamichi(at)fujitsu(dot)com> wrote in
> > On Friday, January 27, 2023 8:00 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> > > So, you have changed min_apply_delay from int64 to int32, but you haven't
> > > mentioned the reason for the same? We use 'int' for the similar parameter
> > > recovery_min_apply_delay, so, ideally, it makes sense but still better to tell your
> > > reason explicitly.
> > Yes. It's because I thought I need to make this feature consistent with the recovery_min_apply_delay.
> > This feature handles the range same as the recovery_min_apply delay from 0 to INT_MAX now
> > so should be adjusted to match it.
>
> INT_MAX can stick out of int32 on some platforms. (I'm not sure where
> that actually happens, though.) We can use PG_INT32_MAX instead.
>

But in other integer GUCs including recovery_min_apply_delay, we use
INT_MAX, so not sure if it is a good idea to do something different
here.

--
With Regards,
Amit Kapila.

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