Generic reasons for recursive performance not to peg CPU?

[Matus UHLAR - fantomas]

On 12.01.14 17:16, Doug Barton wrote:
>Without going into too much detail, doing some performance testing 
>and am seeing a weird result. On the same systems authoritative 
>queries will happily peg the CPU. However when running recursive 
>queries (with a small zone, all data cached before testing) the CPU 
>never gets above 80%. The disk is nearly inactive on both systems, 
>and there is no swapping. Using BIND 9.9.4.
>
>Is there perhaps something obvious I'm overlooking here? Any 
>suggestions are welcome.

Besides the zone and recursion definitions, the same configuration?
DLZ in use by any way ?
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Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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