intermediateMongoDB Transactions — Single & Multi-Document ACID
Why should multi-document transactions be the exception rather than the default way of working in MongoDB?
They carry real overhead — they hold locks and resources across every operation until commit, and hold onto oplog entries longer than a normal write. The idiomatic MongoDB approach is modeling data so related things that must change together live in one document, atomic for free, reaching for a transaction only when that modeling genuinely isn't possible.
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