Your Spark Job Suddenly Became 5x Slower. What Would You Do?
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Your Spark Job Suddenly Became 5x Slower. What Would You Do?
Your Spark job normally takes 20 minutes. Today, it took 2 hours. Most engineers immediately start optimizing the code. Senior Data Engineers do something different. They first ask one simple question: **What changed?** In this short, I share how experienced Data Engineers approach performance issues by thinking about the system before touching ...
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