A critical lesson learned at Planbox: escalating select statements led to destructive table locks, especially when combined with sporadic inserts. Optimizing read operations is key to database health. #DatabasePerformance #TableLocks #SQLOptimization #TechLessons

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A real-world incident at Planbox where SELECT statements unexpectedly escalated to full table locks, causing database performance issues. When customers accessed certain web app pages, read-only queries triggered table locks that conflicted with concurrent inserts, ultimately degrading the database significantly.

Database Disaster: SELECT Statements Causing Table Locks! #shorts