Date: Thu, 25 Jul 2019 10:29:44 +0200
From: Jehan-Guillaume de Rorthais <jgdr@dalibo.com>
To: Michael Paquier <michael@paquier.xyz>
Cc: Jesper Pedersen <jesper.pedersen@redhat.com>, PostgreSQL-development
 <pgsql-hackers@postgresql.org>
Subject: Re: pg_receivewal documentation
Message-ID: <20190725102944.79a0be92@firost>
In-Reply-To: <20190725075817.GA7647@paquier.xyz>
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On Thu, 25 Jul 2019 16:58:17 +0900
Michael Paquier <michael@paquier.xyz> wrote:

> On Wed, Jul 24, 2019 at 03:03:04PM +0200, Jehan-Guillaume de Rorthais wrote:
> > Unless I am missing something, another solution might be to use a dedicated
> > role to pg_receive{xlog|wal} with synchronous_commit lower than
> > remote_apply.  
> 
> Aren't you confused by the same thing as I was upthread [1]?
> [1]: https://www.postgresql.org/message-id/20190710080423.GG1031@paquier.xyz
> 
> remote_apply affects all sessions.  So even if you use a replication
> role with synchronous_commit = on and have pg_receivewal use that with
> remote_apply set in postgresql.conf, then remote_apply is effective
> for all the other sessions so these will still be stuck at commit
> waiting for pg_receivewal to apply WAL if it is a synchronous
> standby.

Argh!

(Sorry for the noise)