[jira] [Created] (SPARK-27811) Docs of spark.driver.memoryOverhead and spark.executor.memoryOverhead exists a little ambiguity

["jiaan.geng (JIRA)" <ji...@apache.org>]

jiaan.geng created SPARK-27811:
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             Summary:  Docs of spark.driver.memoryOverhead and spark.executor.memoryOverhead exists a little ambiguity
                 Key: SPARK-27811
                 URL: https://issues.apache.org/jira/browse/SPARK-27811
             Project: Spark
          Issue Type: Improvement
          Components: Documentation, Spark Core
    Affects Versions: 2.4.0, 2.3.0
            Reporter: jiaan.geng


I found the docs of {{spark.driver.memoryOverhead}} and {{spark.executor.memoryOverhead}} exists a little ambiguity.
For example, the origin docs of {{spark.driver.memoryOverhead}} start with {{The amount of off-heap memory to be allocated per driver in cluster mode}}.
But {{MemoryManager}} also managed a memory area named off-heap used to allocate memory in tungsten mode.
So I think the description of {{spark.driver.memoryOverhead}} always make confused.

{{spark.executor.memoryOverhead}} has the same confused with {{spark.driver.memoryOverhead}}.



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