Koan Module Request: OOM Out Of Memory

[KyleTryon]

What feature or concept is to be taught?
With this module, I aim to teach: How to correctly identify an OOM error or exit code 137. This may include requesting for existing employees to identify the total memory usage via graylog as an additional goal.

Provide a link to the documentation on this feature or concept.
Link to documentation

Koans are currently ordered by difficulty. What module would come after?
10 Reusable config