Locking InternalsBy

Amit R S BansalDirector, Principal Consultant & Trainer

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Technical Director, eDominer Systems & Peopleware India

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Amit R S Bansal

Lock escalation Row/Page -> Table (default) or Row/Page -> Partition (if table is partitioned and partition-level locking

is enabled) Never from Row -> Page & Never from Partition -> Table

Update Locks TRAN A is locking rec1. TranB wants to update rec1, rec2 & rec3. TRANB will wait for an U lock on rec1, but will not lock rec2 & rec3

(thus increasing concurrency)PAGE locks

Mysterious (watch the demo)

Locking Myths debunked

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