Question: Suppose that we use the tree protocol of Section 16.1.5 to manage concurrent access to a B+-tree. Since a split may occur on an insert

Suppose that we use the tree protocol of Section 16.1.5 to manage concurrent access to a B+-tree. Since a split may occur on an insert that affects the root, it appears that an insert operation cannot release any locks until it has completed the entire operation. Under what circumstances is it possible to release a lock earlier?

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