BIND 8.4.5 as cache server, long delay to resolve some domains...

Ronan Flood ronan at
Wed Jan 26 16:51:39 UTC 2005

Jacques-Andre Petit <japetit at> wrote:

> Actually, in Belgium, to request a domain name, your name server MUST 
> have a .be  A Record.


> This avoid such kind of trouble. So I suppose there is a internet 
> directive to act that way.

A recommendation, probably -- can anyone provide a reference?

> Does BIND9 solve this problem? We tried BIND9 on different servers and 
> had performance problems (there are currently 35.000 users on the 
> network) and were suggested to downgrade to BIND8 to get better results.
> As long as cache fills up, the problem remains but after a while, it 
> disappear nearly, with some customers still having delays. It is these 
> delays we try to put out of the scene.

I believe BIND9 keeps hold of the original query so that it can respond
to it when the intermediate information (NS addresses) becomes available.
A quick test with your example appears to confirm this, with two
servers running 9.2.3 and 9.3.0.

                      Ronan Flood <R.Flood at>
                        working for but not speaking for
             Network Services, University of London Computer Centre
     (which means: don't bother ULCC if I've said something you don't like)

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