How do I identify if bind9 is using 4 cores?

Anand Buddhdev anandb at
Thu Jun 17 08:29:16 UTC 2021

On 17/06/2021 05:32, Manish Rane wrote:

Hi Manish,

> I have BIND 9.16.17-Ubuntu on ubuntu and have 4 cores. I have configured
>  more /etc/default/bind9
> OPTIONS="-n 4"
> And then restarted the services. How do I verify if bind9 has spawned 4
> processes and distributed among those?

BIND does not start multiple processes. There's only ever one process,
called "named". BIND starts multiple threads. You can see these by using
the "top" command in Linux, and then pressing "H" to see threads rather
than processes. You should see 4 worker threads, as well as some other


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