Basic bind capacity question

Mike Toler mike.toler at
Thu Jul 19 13:53:02 UTC 2007

Yes, I'm using a postgres DB backend.  Using a single instance of the
queryperf tool and a DB of ~120,000 entries, I'm getting 40 qps.


> -----Original Message-----
> From: Adam Tkac [mailto:atkac at]
> Sent: Thursday, July 19, 2007 5:00 AM
> To: Mike Toler
> Cc: bind-users at
> Subject: Re: Basic bind capacity question
> Mike Toler napsal(a):
> > I'm just trying to get some basic capacity ratings for my Bind 9.4
> > Server setup, and I think I must be doing something wrong.
> > No matter how many threads I have attempting to perform lookups
> > spread across multiple machines) I'm seeing throughput of
> > 30 DNS lookups per second.  That seems ridiculously small to me.
> >
> > It also seems like I can only have around 5 simultaineous queries
> > 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
> > 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)
> >
> Interesting. How did you test it? I tested performance of bind 9.4 on
> local computer (only about 30 RRs) with queryperf utility (shipped
> bind in contrib subdirectory) about two weeks ago and result was about
> 12000 queries per second if I remember correctly (I have 2x 1,8 GHz
> machine). Are you using some database backend?
> Adam

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