[Dnsmasq-discuss] dnsmasq caching stats meaning

Simon Kelley simon at thekelleys.org.uk
Wed Jun 26 15:33:11 BST 2013


On 26/06/13 15:21, Olivier Mauras wrote:
> Hello,
>
> I plan to deploy dnsmasq on a medium sized network as primary caching
> DNS for both workstations and servers - 1500 workstations / 600 servers.
> I'm currently testing it on a test subnet with around 50 workstations
> and have been wondering about the cache stats.
>
> dnsmasq[27357]: time 1372247969
> dnsmasq[27357]: cache size 2000, 0/65220 cache insertions re-used
> unexpired cache entries.
> dnsmasq[27357]: queries forwarded 22019, queries answered locally 11238
> dnsmasq[27357]: server xx.xx.xx.164#53: queries sent 5812, retried or
> failed 0
> dnsmasq[27357]: server xx.xx.xx.165#53: queries sent 5812, retried or
> failed 0
> dnsmasq[27357]: server xx.xx.xx.114#53: queries sent 16201, retried or
> failed 30
> dnsmasq[27357]: server xx.xx.xx.115#53: queries sent 925, retried or
> failed 10
>
> What exactly means "0/65220 cache insertions re-used unexpired cache
> entries"??
>


It means dnsmasq handled 65520 names lookups that needed to be sent to 
upstream severes that nothing was thrown out of the cache before 
reaching the end of its time-to-live, to make room for a newer name. For 
the first number, smaller is better.

Simon.






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