Then I realized none of my clients were caching DNS entries on the local side. I can only assume every DNS request passes through my DNS server, which obviously has been working, but has to be a bear on the network.
DNS is a very lightweight, low-volume protocol. UDP only, not disk access, and often DNS queries are under 100 bytes per UDP packet, with DNS responses being under 200 bytes (max is 512 bytes as limited by the basic DNS protocol)
so DNs is not a "bear" on network volume
Len
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