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From: Andres Freund <[email protected]>
To: tushar <[email protected]>
Cc: Petr Jelinek <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Craig Ringer <[email protected]>
Cc: Petr Jelinek <[email protected]>
Cc: [email protected]
Subject: Re: Minimal logical decoding on standbys
Date: Fri, 1 Mar 2019 09:46:28 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>

Hi,

On 2019-03-01 13:33:23 +0530, tushar wrote:
> While testing  this feature  found that - if lots of insert happened on the
> master cluster then pg_recvlogical is not showing the DATA information  on
> logical replication slot which created on SLAVE.
> 
> Please refer this scenario -
> 
> 1)
> Create a Master cluster with wal_level=logcal and create logical replication
> slot -
>  SELECT * FROM pg_create_logical_replication_slot('master_slot',
> 'test_decoding');
> 
> 2)
> Create a Standby  cluster using pg_basebackup ( ./pg_basebackup -D slave/ -v
> -R)  and create logical replication slot -
> SELECT * FROM pg_create_logical_replication_slot('standby_slot',
> 'test_decoding');

So, if I understand correctly you do *not* have a phyiscal replication
slot for this standby? For the feature to work reliably that needs to
exist, and you need to have hot_standby_feedback enabled. Does having
that fix the issue?

Thanks,

Andres

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