Ask HN: Simple server metric monitoring tools?

1 points by uvu 5y ago ↗ HN

Is there a simple server metric monitoring tools which does not need to configure a lots.

What I mean simple is, just want to set how much CPU%, RAM% and Disk space usage and when server got over that percentage then create alert.

Is there simple tool like this? I saw once on HN and now I can't search it back.