On 2017-11-06 11:07:04 +0800, Craig Ringer wrote:
> Would it make sense to teach xlogreader how to fetch from WAL archive,
> too? That way if there's an archive, slots could continue to be used
> even after we purge from local pg_xlog, albeit at a performance cost.
>
> I'm thinking of this mainly for logical slots.
That seems more like a page read callback's job than xlogreader's.
Greetings,
Andres Freund
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