BIND 9.16.25 "file descriptor exceeds limit" messages

[Petr Špaček]

On 01. 02. 22 13:30, Anand Buddhdev wrote:
> Hi Ondrej,
> 
> Do you recommend setting LimitNOFILE=1048576 in the systemd unit file 
> for BIND?

I'm not Ondrej, but let me try:
No, that would be redundant.

As you correctly noticed, the log message "adjusted limit on open files 
from 4096 to 1048576" already shows that BIND adjusted OS-level file 
descriptor limit.

The only way out is what Tony wrote in another thread: Add "-S <number>" 
parameter to bump the built-in limit of 21000 FDs. This is BIND's limit 
as opposed to OS limit, so systemd-level settings cannot raise it.

... or migrate to 9.18.0 which does not have this built-in limit anymore.


> On 28/01/2022 15:03, Anand Buddhdev wrote:
> 
>> Hi Ondrej,
>>
>> It is 1024. I see named logging this:
>>
>> adjusted limit on open files from 4096 to 1048576
>>
>> I thought there was no need to set LimitNOFILE=1048576 in the systemd 
>> unit file. Am I mistaken?


-- 
Petr Špaček  @  Internet Systems Consortium