How to measure cache hit resolution time in unbound 1.24.1

[sir izake]

Hi Seth

 num-threads: 64
msg-cache-slabs: 32
rrset-cache-slabs: 32
infra-cache-slabs: 32
key-cache-slabs: 32
ratelimit-slabs: 32
ip-ratelimit-slabs: 32

The physical server is a dell 640 with specs below

hw.ncpu: 104
hw.model: Intel(R) Xeon(R) Gold 6230R CPU @ 2.10GHz

Thank you
Isaac


On Tue, Nov 25, 2025 at 5:13 AM Seth Van Buren <seth.vanburen at versent.com.au>
wrote:

> Home many cores/slabs are you using?
>
> *From: *Unbound-users <unbound-users-bounces at lists.nlnetlabs.nl> on
> behalf of sir izake via Unbound-users <unbound-users at lists.nlnetlabs.nl>
> *Date: *Tuesday, 25 November 2025 at 2:51 pm
> *To: *unbound-users at lists.nlnetlabs.nl <unbound-users at lists.nlnetlabs.nl>
> *Subject: *How to measure cache hit resolution time in unbound 1.24.1
>
> Hi
>
> I have installed unbound 1.24.1 on FreeBSD 14.3 OS. My cache hit rate is
> 76% with over 20% coming through recursive replies.
>
> The median time for recursive replies is 440ms while the avg is 520ms.
>
> This setup has been running for over 72hrs. I expect stats to improve but
> that is not happening.
>
> Just wanted to find out if there is a way to measure the cache hit
> resolution time in a dashboard?
>
> Can I do anything to improve cache hit ratio?
>
> Can I also improve the recursive reply time?
>
> I am using unbound_exporter to monitor stats in grafana
>
> My configs have been adjusted as follows:
> rrset-cache-size: 20G
> msg-cache-size: 10G
> cache-min-ttl: 1800
>
> I am using the root hint files directly on the server for recursive lookup
> and not forwarding to any public resolver
>
> Thank you
>
> Regards,
> Isaac
>
>
>
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