[Pdns-users] how do query the recursor cache to see what's in it?

Kenneth Marshall ktm at rice.edu
Thu Mar 10 18:52:02 UTC 2011

On Thu, Mar 10, 2011 at 10:44:12AM -0800, Alfred B. M. Cordero wrote:
> On Thu, 10 Mar 2011 10:25:14 -0800 Kenneth Marshall <ktm at rice.edu> 
> wrote:
> >
> >Wow! That is not a lot of bandwidth. If you are pegging your
> It depends.
> >cap, responses may be taking a longer while to be returned and
> >pdns-recursor is timing out. Have you tried increasing the
> >value for network-timeout over the default 1500 ms?
> Thanks, I will try the increase. However it seems that pdns does
> not use it's own cache. Is there additional config to change the
> behavior?
> e.g. mail client connects to pop.example.com every 10 minutes
> should pdns trust the info it has already from 10 minutes ago?
> It does not seem to do that. There is chance that we don't 
> understand
> how pdns internals work.

It should definitely use its own cache. I did not get a result
for pop.example.com from DNS so I cannot help with that. Whether
or not a new query is made, depends upon the TTL for the record
at the very least. We would need to see actual examples to be
able to offer more.


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