This right here! Don't be afraid to over instrument. You can always down Rez or even just basic statistical sampling before you actually commit your measurements to Time series database.
As annoying as that may sound, it's a hell of a lot harder to go back in time to observe that bizarre intermittent issue...
This is very true for systems and components you don’t thoroughly understand.
By all means instrument batteries, motors, gearboxes, positioning systems, turbines, and so on. If your system is mostly a CRUD or some business logic automation, then the need to overinstrumenting it is much smaller. Databases are well understood after all.