[Netalyzr] DNS latency threshold

Zhen Cao zehn.cao at gmail.com
Fri Jan 15 22:16:59 PST 2010

Thanks for the reply.

Another question followed: which DNS is under test?

I am configuring my DNS at (google public dns), but the
analysis result indicates that "Your NAT has a built in DNS proxy. The
DNS request was received from". So the DNS performance
in done between my NAT box and the outside internet?

And when i am accessing the web, i checked that the DNS response is
actually received from the

Thanks for the help.

On Sat, Jan 16, 2010 at 1:59 PM, Nicholas Weaver
<nweaver at icsi.berkeley.edu> wrote:
> 750.  And we set a threshold simply because we don't have gradiants: either it raises an alert or not, so we have to pick a number that is somewhat sensible.
> On Jan 15, 2010, at 9:55 PM, Zhen Cao wrote:
>> Hi Netalyzr Contributors and All,
>> I'd like to know what's DNS latency threshold in Netalyzr. In one
>> test, I got a DNS lookup latency of 770ms and it reported "Your ISP's
>> DNS server is slow to lookup names". In another test, I got 740ms and
>> did not see that warning. Did you set a threshold between 740ms and
>> 770ms and why?
>> Thanks,
>> Zhen
>> _______________________________________________
>> Netalyzr mailing list
>> Netalyzr at mailman.ICSI.Berkeley.EDU
>> http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/netalyzr

More information about the Netalyzr mailing list