A streaming workload ingests Kafka events into a streaming table through a continuously running query. Throughput seemed to drop after a configuration change, and the engineer wants to confirm, on the live query, how many input rows per second the source is delivering and how long each micro-batch takes to process. Where should the engineer look?
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Correct answer: The Structured Streaming tab of the Spark UI, which shows active queries with input rate and batch duration statistics
Reference: https://docs.databricks.com/aws/en/optimizations/spark-ui-guide/
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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 (A): The Structured Streaming tab of the Spark UI, which shows active queries with input rate and batch duration statistics
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