[Pdns-users] Number of entries can be stored in cache in pdns_recursor?

[Peter van Dijk]

Hello RBK,

On Jun 13, 2012, at 11:03 , RBK1001 wrote:

> I would like to know what is the size of the cache that can be used for
> storing the entries in pdns_recursor?
> 
> I used below command to start the pdns_recursor
> 
> /usr/sbin/pdns_recursor --local-address=192.168.208.76 --local-port=5300
> --log-common-errors=yes --logging-facility=7 --max-cache-ttl=14400
> --forward-zones=e164.arpa="192.168.208.214:5301;192.168.208.190:5302"
> 
> my backend has 1 million records, so by rite if I generate 1 million
> individual request, I should have 1 million entries in cache, however, when
> I used rec_control to check, it is always around 100xxx records only.


--max-cache-entries defaults to one million. The TTL on your entries could be a factor, however. max-cache-ttl provides an upper bound on caching; a record with a TTL of 60 in the response will still only be cached for 60 seconds.

Kind regards,
-- 
Peter van Dijk
Netherlabs Computer Consulting BV - http://www.netherlabs.nl/