Hi,
I've been getting random events where my firewall becomes completely unresponsive, where the only thing possible to resolve it is literally unplugging it.
My Monit instance manages to send a final email before it dies:
Resource limit matched Service
some.domain.com
Date: Mon, 23 Feb 2026 23:44:12
Action: alert
Host: some.domain.com
Description: cpu usage of 99.9% matches resource limit [cpu usage > 75.0%]
I do not get any warnings other than that single email, which makes me think some process immediately gets the processor up to 100% mark.
The event seems to be happening after approx 2 weeks running after unplugging it and plugging it back in.
It is not something introduced in recent updates (running the latest, fully patched), because i've been having this issue for some time.
How can I find out which process is going rogue, knowing that once it happens I can no longer access anything on the OPNsense??
Is it possible to run a 'top' logging to a file, and if so what options would be useful?
Any help is appreciated!