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From: Julien Rouhaud <[email protected]>
To: Tom Lane <[email protected]>
Cc: [email protected]
Subject: Re: Isn't wait_for_catchup slightly broken?
Date: Tue, 11 Jan 2022 14:25:02 +0800
Message-ID: <20220111062502.obh4gegzcaova5dk@jrouhaud> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On Mon, Jan 10, 2022 at 02:31:38PM -0500, Tom Lane wrote:
> 
> So I think we need to fix it to capture the target WAL position
> at the start, as I've done in the attached patch.

+1, it looks sensible to me.

> In principle
> this might make things a bit slower because of the extra
> transaction required, but I don't notice any above-the-noise
> difference on my own workstation.

I'm wondering if the environments where this extra transaction could make
a noticeable difference are also environments where doing that extra
transaction can save some iteration(s), which would be at least as costly.

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