<ul><li>The author faced issues with slow queries and an increase in RDS sessions post-release.</li><li>After debugging and examining the codebase, the author discovered the use of gap locks in InnoDB.</li><li>Gap locks prevent other transactions from inserting a row into a specific range until the current transaction completes.</li><li>Using an indexed column helps MySQL precisely lock the specific gap and prevent unnecessary blocking of other transactions.</li></ul>

When a Row Lock Becomes a Gap Lock: My Real-Life MySQL Adventure

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