* Move some memory division details

* edit

* Review comments

* Update docs/content/preview/reference/configuration/smart-defaults.md

Co-authored-by: Aishwarya Chakravarthy  <achakravarthy@yugabyte.com>

* Update docs/content/preview/reference/configuration/yb-master.md

* review comments

* review comments

* edits

* edit

* review comment

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Co-authored-by: Aishwarya Chakravarthy <achakravarthy@yugabyte.com>