Basic bind capacity question

Marcus N. Morgan marcus at
Thu Jul 19 12:54:53 UTC 2007

What operating system are you using?
What were your bind configuration options?
I commonly get 10-30 thousand per second mostly depending
on the memory speed and cache size.


On Wed, 18 Jul 2007, Mike Toler wrote:

> Date: Wed, 18 Jul 2007 14:32:48 -0500
> From: Mike Toler <mike.toler at>
> To: bind-users at
> Subject: Basic bind capacity question
> I'm just trying to get some basic capacity ratings for my Bind 9.4 DNS
> Server setup, and I think I must be doing something wrong.
> No matter how many threads I have attempting to perform lookups (even
> spread across multiple machines) I'm seeing throughput of approximately
> 30 DNS lookups per second.  That seems ridiculously small to me.
> It also seems like I can only have around 5 simultaineous queries (i.e.
> if I spawn any more than 5 threads, the extra ones timeout).
> If I run one thread, I can get 30 DNS lookups per second.  If I run 2
> threads, I get about 15. yada-yada.
> I can even spread the threads over multiple machines, and they still
> only total up to about 30 lookups per second.
> My DNS server is a 4-CPU/1.6 ghz machine with about 16 gig of ram.
> Michael Toler
> System Test Engineer
> Prodea Systems, Inc.
> 214-278-1834 (office)
> 972-816-7790 (mobile)
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