Last I checked RDS uploads transaction logs for DB instances to Amazon S3 every five minutes. Litestream by default does it every second (you can go sub second with litestream if you want).

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rienbdj an hour ago | parent [-]

Yes but there is still a (small) window where confirmed writes can be lost

	▲	andersmurphy an hour ago \| parent [-]
		Right and that window is bigger for RDS by the looks of it.