spark git commit: [SPARK-9558][DOCS]Update docs to follow the increase of memory defaults.

Repository: spark Updated Branches: refs/heads/master ff9169a00 - ba1c4e138 [SPARK-9558][DOCS]Update docs to follow the increase of memory defaults. Now the memory defaults of master and slave in Standalone mode and History Server is 1g, not 512m. So let's update docs. Author: Kousuke

spark git commit: [SPARK-9558][DOCS]Update docs to follow the increase of memory defaults.

Repository: spark Updated Branches: refs/heads/branch-1.5 b3117d312 - 444058d91 [SPARK-9558][DOCS]Update docs to follow the increase of memory defaults. Now the memory defaults of master and slave in Standalone mode and History Server is 1g, not 512m. So let's update docs. Author: Kousuke