Maintained by: NLnet Labs

[Unbound-users] Performance tuning tips?

W.C.A. Wijngaards
Tue Feb 5 11:09:53 CET 2013


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Hi Jaco, Andreas,

On 02/05/2013 10:52 AM, lst_hoe02 at kwsoft.de wrote:
> 
> Zitat von Jaco Lesch <jacol at saix.net>:
> 
>> Does anybody have some additional performance tuning tips for
>> Unbound, specificityon Solaris 11?
>> 
>> I have followed the recommended settings in the "HowTo Optimise",
>> but still seem to hit a ceiling of +/- 3600 max queries a
>> second.On top of that the platform/OS do become a bit sluggish
>> when logging in via SSH.
>> 
>> Our install details: OS: Solaris 11 CPU: SPARC T3 Unbound ver:
>> 1.4.18-2 (64-bit) LDNS ver: 1.6.15 (64-bit) Libevent ver: 2.0.20
>> (64-bit)
>> 
> 
> Hello you should clearify the following questions
> 
> Which part of the "HowTo Optimise" do you use and how? What is the
> load on your system as of CPU power used? Have you checked the
> upstream connection or forwarders used? Do you use DNSSEC? What
> kind of data do you use for testing?
> 
> Without this no one will be able to tell why your system max out
> at 3600qps.

The sparc T3 has special hardware threads.  Unbound has an option to
use the solaris thread library, configure --with-solaris-threads and
perhaps with the sun compiler (CC=/opt/.../cc).  If the hardware
threads really work, then with num-threads up to 64 (or your number of
hardware support), you could, potentially (this has not been tried)
get up to 64x your previous performance.

Best regards,
   Wouter

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