In the jobs timeline, one stage of a nightly Lakeflow Job takes 40 minutes while its sibling stages finish in about three minutes each. Before changing any configuration, the engineer wants to understand why this particular stage is slow. What is the recommended next step in the investigation?
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Correct answer: Open the stage page and examine the task duration distribution, summary metrics for skew, and spill statistics
Reference: https://docs.databricks.com/aws/en/optimizations/spark-ui-guide/long-spark-stage
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02 — The Myelin Layer · Canonical Discussion
Where the exam tries to trick you — and how those who passed solved it.
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Official Answer (B): Open the stage page and examine the task duration distribution, summary metrics for skew, and spill statistics
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