On 01. 02. 22 15:43, Anand Buddhdev wrote:
On 01/02/2022 15:33, Petr Špaček wrote:
Hi Petr,
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.
Thanks. I will try this out. The option does come with a warning though.
... or migrate to 9.18.0 which does not have this built-in limit anymore.
I have packages ready. But I don't feel comfortable deploying this
version in production. When 9.16 came out, it was branded as "stable"
but it took several updates before it actually worked reliably for us.
Version 9.18 has a lot of new code, and I am sure several things will be
glitchy, so I will wait a while and see how it develops before
considering it for any production servers here.
That's understandable. We can only hope that not everyone will delay
upgrading :-)
On a more serious note, we have significantly expanded load testing with
UDP traffic during the 9.17 development cycle, so hopefully, 9.18.0 has
fewer rough edges than 9.16.0 had.
I apologize for that bad experience. Since then, we have learned our
lesson and have been working on test improvements.
--
Petr Špaček
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