Generic reasons for recursive performance not to peg CPU?

Doug Barton dougb at dougbarton.us
Mon Jan 13 01:16:48 UTC 2014


Howdy,

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.

Doug


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