[Pdns-users] Question about Performace

[Adrian Minta]

Hi Zak,

PowerDNS Authoritative Server with mariadb/mysql backend is vulnerable 
to ddos attacks:

github.com

DDoS attack with random A requests causes SQL backend overload · Issue 
#11784 · PowerDNS/pdns <#>

Hi, Program: Authoritative Issue type: Feature request Short description 
DDoS attack with random A requests causes SQL backend overload The zone 
cache feature is only caching the "domains" table, it's not caching the 
each record in the b...

🔗 https://github.com/PowerDNS/pdns/issues/11784 
<https://github.com/PowerDNS/pdns/issues/11784>

  Other back-ends may suffer from this issue, except LMDB.


On 10/31/25 4:57 PM, Zakaria via Pdns-users wrote:
> Hi All,
>
> I have one question and wonder if anyone has answer for, and here is 
> the context first.
>
> I have been using PowerDNS, without database backend but just plain 
> bind db text files.
>
> I noticed my powerdns server setup is exceptionally fast when I 
> benchmark, in case for records anyone is interested, you can check 
> results out here:-
> https://zakaria.website/dnsbenchmark.png
>
> I wondered if I switch to DB, would it hinder performance? This my 
> question, Does database like mysql and ldap get dns entries get cached 
> and in which format? is it like bind format in db text files?
>
> Looking forward.
>
> With thanks.
>
> Zak.
>
-- 
Best regards,
Adrian Minta

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