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techgeorge
by • New Contributor II
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Understanding Coalesce, Skewed Joins, and Why AQE Doesn't Always Intervene

In Spark, data skew can be the silent killer of performance. One wide partition pulling in 90% of the data?But even with AQE (Adaptive Query Execution) turned on in Databricks, skewness isn't always automatically identified— and here’s why.What Is co...

Data Skew.png
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BigRoux
Databricks Employee
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@mark_ott , this question seems right up your alley. Care to comment?

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