Hi, I'm running a single user instance on a cheap VPS service. I want to learn how to manage the resources correctly. G**gle search has not yielded the results I'm looking for.

Essentially, is there a list of locations or files I should be monitoring to keep an eye on my resource usage? I know how to check the size of /pictrs, but just want to be sure I know all the tricks for assessing the health of my instance.

Does anyone have links to admin resources they've found handy?