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From: Tom Lane <[email protected]>
To: Tomas Vondra <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: sequences vs. synchronous replication
Date: Sat, 18 Dec 2021 16:27:12 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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Tomas Vondra <[email protected]> writes:
> Here's a PoC demonstrating this idea. I'm not convinced it's the right 
> way to deal with this - it surely seems more like a duct tape fix than a 
> clean solution. But it does the trick.

I was imagining something a whole lot simpler, like "don't try to
cache unused sequence numbers when wal_level > minimal".  We've
accepted worse performance hits in that operating mode, and it'd
fix a number of user complaints we've seen about weird sequence
behavior on standbys.

			regards, tom lane

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