ECC interrupts were never a problem at reasonable counts. It's just this machine where the memory was falling apart where it was a problem. Our system was robust to a machine halting, but not so great at dealing with a machine running very very slow. Plus, it wasn't easy to connect and shut down the service (maybe we should have just killed it from IPMI, but this was the only time it happened, so learning experience).

I had a similar issue one time where a Pentium III era server rebooted and came up with a comically small amount of memory, maybe 2-4 mb instead of 128 mb. That wasn't too bad, because it was a very lightly service; important to be on its own machine for reasons, but didn't need much. Just ran a little slow when it was running from swap. I think it did trigger a swap usage alert, and then it was like why is it swapping, why is it so slow, wait why doesn't it have any memory!?