Update Succeeds but Data Not Changed? Investigating MySQL Binlog vs Redo‑Log and Two‑Phase Commit

This article analyzes a puzzling MySQL update where the operation reports success yet the data remains unchanged, explains the WAL mechanism and two‑phase commit process, and provides a step‑by‑step binlog investigation script to uncover the root cause.

Binlogmysqlredo-log

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Update Succeeds but Data Not Changed? Investigating MySQL Binlog vs Redo‑Log and Two‑Phase Commit