HyukjinKwon commented on issue #25545: [SPARK-28843][PYTHON] Set OMP_NUM_THREADS to executor cores for python URL: https://github.com/apache/spark/pull/25545#issuecomment-525823240 Looks okay but can we please be explicit about what this env means in general Spark jobs and upgrade migration guide to be safe? It affects all the PySpark jobs and we should better be clear on that.
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