Different defaults for used ram in `check-ram.rb`

[sekrett]

For example it is ok to have 20% of free ram but 40% of used ram is considered critical which is probably wrong.

[majormoses]

Yes this check has sane defaults when you take them as is, when using --used you will want to adjust your thresholds accordingly. I have not reviewed that code in a while so I am not sure how feasible it is to modify the defaults when an option is changed only if if cli opts were not passed in

This is related to a couple issues/prs so I am linking them for context:

• Hardcoded threshold values in check-ram.rb override command line values #46
• closes #46 #47

If you can propose a solution I am more than happy to review a PR.

[sekrett]

It think it should be the inverse for --used: 90% for warn and 95% for crit. I'll try to do a PR.

[majormoses]

Yup, the trick is to only do that when someone has not changed the defaults which is when I originally did I did not realize and it made it impossible to overwrite. We had to fix it so that it always allowed the user full control. If you can think of some way to do that I am all ears.