Analysis of MySQL Lock Mechanisms and Deadlock Scenarios During High‑Concurrency Events

This article examines a real‑world MySQL deadlock that occurred during a large promotion, explains the various lock types (shared, exclusive, gap, next‑key, insert‑intention), shows code and lock‑log examples, and derives best‑practice recommendations for preventing similar concurrency issues.

GapLocksNextKeyLocksdeadlock

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Analysis of MySQL Lock Mechanisms and Deadlock Scenarios During High‑Concurrency Events