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[SPARK-17010][MINOR][DOC]Wrong description in memory management document #14591

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[SPARK-17010][MINOR][DOC]Wrong description in memory management document #14591

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2 changes: 1 addition & 1 deletion docs/tuning.md
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Expand Up @@ -115,7 +115,7 @@ Although there are two relevant configurations, the typical user should not need
as the default values are applicable to most workloads:

* `spark.memory.fraction` expresses the size of `M` as a fraction of the (JVM heap space - 300MB)
(default 0.6). The rest of the space (25%) is reserved for user data structures, internal
(default 0.6). The rest of the space (40%) is reserved for user data structures, internal
metadata in Spark, and safeguarding against OOM errors in the case of sparse and unusually
large records.
* `spark.memory.storageFraction` expresses the size of `R` as a fraction of `M` (default 0.5).
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