Re: Make default subscription streaming option as Parallel

From: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
To: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
Cc: shveta malik <shveta(dot)malik(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Make default subscription streaming option as Parallel
Date: 2024-10-18 04:17:53
Message-ID: CAFiTN-umjpfJsp8tzTtjOSiodDXUxe6kP3nKTqQsdjoCEnHygw@mail.gmail.com
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On Tue, Oct 8, 2024 at 3:38 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:

> On Tue, Oct 8, 2024 at 2:25 PM shveta malik <shveta(dot)malik(at)gmail(dot)com>
> wrote:
> >
> > On Mon, Oct 7, 2024 at 4:03 PM vignesh C <vignesh21(at)gmail(dot)com> wrote:
> > >
> >
> > With parallel streaming as default, do you think there is a need to
> > increase the default for 'max_logical_replication_workers' as IIUC
> > parallel workers are taken from the same pool.
> >
>
> Good question. But then one may say that we should proportionately
> increase max_worker_processes as well. I don't know what should be
> reasonable new defaults. I think we should make parallel streaming as
> default and then wait for some user feedback before changing other
> defaults.
>
>
I agree, actually streaming of in progress transactions is a useful feature
for performance in case of large transactions, so it makes sense to make it
"on" by default. So +1 from my side.

--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com

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