@stephenw10 said in High CPU usage on interrupt processing:
Hmm, is the firewall actually idle? No traffic at all?
Yeah, firewall is idle. The server is located in a small subnet and no one is currently connected to it.
There’s some occasional broadcast traffic (e.g. DHCP requests) form other devices/servers on the network, but I doubt it can cause any trouble.
I think you’re right about RAID.
I moved /tmp and /var to RAM but still there’s a lot of interrupts on mfi0 device, yet gstat shows no disk IO except some rare writes.
I’ll try remotely tinker with RAID-related settings in BIOS, maybe I find something I missed.
Thank you for suggestions!