this is a vm running on a intel nuc NUC7i5BNH with 2/4 cores assigned. additionally the unbound process on the same mashine which pihole is forwarding 99% of its queries is running recursive and bored anyway.
I have to admit there are "couple" of ptr requests sourcing from an netflow appliance but these requests exists since ever and the load wasnt that high in the past.
With your number of blocklists (63) and gravity list size (1,376,172 domains), combined with NULL blocking (new default for V4.0), this does not appear unusual. This thread has a good explanation of memory and CPU usage in V4.
