Subject: Re: PG 14 release notes, first draft
To: Amit Kapila <amit.kapila16@gmail.com>,
 Justin Pryzby <pryzby@telsasoft.com>
Cc: Bruce Momjian <bruce@momjian.us>,
 pgsql-hackers <pgsql-hackers@postgresql.org>
References: <20210510060308.GC6088@momjian.us>
 <20210510140005.GB27406@telsasoft.com>
 <CAA4eK1+kYRCXZXtccZCpJnmBn9MQrrqmkg9ybzqR9sUj5JjSbQ@mail.gmail.com>
From: "Jonathan S. Katz" <jkatz@postgresql.org>
Message-ID: <97f6b32d-8c48-5656-b1ce-a3c4de8d6bf3@postgresql.org>
Date: Tue, 11 May 2021 09:13:31 -0400
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From: "Jonathan S. Katz" <jkatz@postgresql.org>
To: Amit Kapila <amit.kapila16@gmail.com>,
 Justin Pryzby <pryzby@telsasoft.com>
Cc: Bruce Momjian <bruce@momjian.us>,
 pgsql-hackers <pgsql-hackers@postgresql.org>
Message-ID: <97f6b32d-8c48-5656-b1ce-a3c4de8d6bf3@postgresql.org>
Subject: Re: PG 14 release notes, first draft
References: <20210510060308.GC6088@momjian.us>
 <20210510140005.GB27406@telsasoft.com>
 <CAA4eK1+kYRCXZXtccZCpJnmBn9MQrrqmkg9ybzqR9sUj5JjSbQ@mail.gmail.com>
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First Bruce, thank you for compiling the release notes draft. Comments
inline:

On 5/10/21 11:56 PM, Amit Kapila wrote:
> On Mon, May 10, 2021 at 7:30 PM Justin Pryzby <pryzby@telsasoft.com> wr=
ote:
>>
>> Can these be merged:
>>  Allow logical replication to stream long transactions to standbys (Di=
lip Kumar, Tomas Vondra, Amit Kapila, Nikhil Sontakke)
>>  Improve the logical replication API to allow streaming large in-progr=
ess transactions (Tomas Vondra, Dilip Kumar, Amit Kapila)
>>
>=20
> I think we should merge the below two:
> Add support for streaming to built-in logical replication (Vondra,
> Dilip Kumar, Amit Kapila, Ajin Cherian, Nikhil Sontakke, Stas Kelvich)
>=20
> Allow logical replication to stream long transactions to standbys
> (Dilip Kumar, Tomas Vondra, Amit Kapila, Nikhil Sontakke)
>=20
> and say something like:
> Allow logical replication to stream long in-progress transactions to st=
andbys
> Previously transactions that exceeded logical_decoding_work_mem were
> written to disk until the transaction completed.

I was going to post a question about the above bullet point(s), so this
clarification helps -- thanks!

Two comments on the above:

1. I do believe ther eis a missing "Tomas" in the first release note.
2. Would you want to s/standbys/subscribers/ given an instance can be in
read/write mode but still receive logical changes? Or did this patch
affect only subscribers that are also standbys?

Thanks,

Jonathan


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