Cheers for that.
After seeing this link, I’ve gone ahead and run the command as well as added it as a post-init script.
I’ve just gone and rebooted my SCALE host, looks to persist ok. Will report back in a couple of days. It’s worth noting that up until this point though, the system has now been running for >2 days entirely without any issues.
After this reboot just now, the ARC limit on my system (previously 50%) will be gone, and this will now be testing only with swap disabled. I’m wondering if at this point iX could just adjust the ZFS RAM behaviour to limit it to 75% instead and call it a day.