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Diffstat (limited to 'docs/configuration.md')
| -rw-r--r-- | docs/configuration.md | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/docs/configuration.md b/docs/configuration.md index 741d6b2b37..c39b489085 100644 --- a/docs/configuration.md +++ b/docs/configuration.md @@ -719,8 +719,8 @@ Apart from these, the following properties are also available, and may be useful <td><code>spark.memory.fraction</code></td> <td>0.75</td> <td> - Fraction of the heap space used for execution and storage. The lower this is, the more - frequently spills and cached data eviction occur. The purpose of this config is to set + Fraction of (heap space - 300MB) used for execution and storage. The lower this is, the + more frequently spills and cached data eviction occur. The purpose of this config is to set aside memory for internal metadata, user data structures, and imprecise size estimation in the case of sparse, unusually large records. Leaving this at the default value is recommended. For more detail, see <a href="tuning.html#memory-management-overview"> |