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From: Ron Johnson <[email protected]>
To: Postgres General <[email protected]>
Subject: Re: Frosen logical replication
Date: Fri, 5 Dec 2025 12:42:20 -0500
Message-ID: <CANzqJaANYmsHk77D4v3Hefa=77PUBD3quxMeHb5rR+cApHbrcA@mail.gmail.com> (raw)
In-Reply-To: <CAB-JLwZJP2c0StczoH7hJuHk3Kwkdf1RVUCdEuHQNt5sQhHuUA@mail.gmail.com>
References: <CAB-JLwa0xW_ua553ep41JdRZFRJrgGoGjnmKUqe+QdQeqOcg0w@mail.gmail.com>
	<CAB-JLwZJP2c0StczoH7hJuHk3Kwkdf1RVUCdEuHQNt5sQhHuUA@mail.gmail.com>

On Fri, Dec 5, 2025 at 11:48 AM Marcos Pegoraro <[email protected]> wrote:

> Em sex., 5 de dez. de 2025 às 09:03, Marcos Pegoraro <[email protected]>
> escreveu:
>
>> I have a logical replication where I want to replicate only one schema.
>> All worked fine, it copied all tables to subscriber, except one. That
>> table has 8GB and it copied 5GB. That copy has been frozen since yesterday,
>> as you can see.
>>
>
> I tried these steps.
> - Tried to restart subscriber, didn't solve and file didn't change its
> size on subscriber.
> Subscriber did not try to restart copying from scratch, just did nothing.
> DIDN'T SOLVE
>
> - Tried to restart publisher 2 or 3 times, didn't solve the problem but
> file changed
> some MBs but was copying from what starting point if server was restarted
> and
> file was partially transfered ? I don't know. Then on subscriber side I
> got some messages like
> "could not receive data from WAL stream: SSL error: unexpected eof while
> reading"
> DIDN'T SOLVE
>
> - Restarted publisher and while restarting I truncated that table on
> subscriber.
> How srsubstate was "d" but srsublsn was NULL It had to copy that file
> entirely, and it did.
> Then that file was completely copied from publisher and until now
> everything seems fine.
> SOLVED, APPARENTLY
>

Maybe have multiple replication slots, one per X number of customers?  More
work for you, but less work required by that single-threaded publisher, and
more granular: hopefully most slots will replicate.

-- 
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!

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