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From: Peter Eisentraut <[email protected]>
To: Tomas Vondra <[email protected]>
To: Tom Lane <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: sequences vs. synchronous replication
Date: Mon, 20 Dec 2021 15:31:11 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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On 18.12.21 22:48, Tomas Vondra wrote:
> What do you mean by "not caching unused sequence numbers"? Reducing 
> SEQ_LOG_VALS to 1, i.e. WAL-logging every sequence increment?
> 
> That'd work, but I wonder how significant the impact will be. It'd bet 
> it hurts the patch adding logical decoding of sequences quite a bit.

It might be worth testing.  This behavior is ancient and has never 
really been scrutinized since it was added.

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