My #DNS service recently got hit by a massive increase in #DoH usage. A brief overview of the tweaks needed to cope with it Tuning a #Pi-Hole to cope with huge query rates TL:DR @The_Pi_Hole have done a stoncking job https://www.bentasker.co.uk/blog/the-internet/703-scaling-pihole-to-cope-with-huge-query-rates #blog