Re: debian jail, setting max open files soft limit does not work

On 12/27/22, Mathias Picker <Mathias.Picker@virtual-earth.de> wrote:
> Hi all,
>
>
> I’ve set up a jail on 13.1 running debian stretch, and now a
> triplestore needing many openfiles for a data import.
>
> Since on Linux the soft limit is pretty hard :) I need to set the
> soft limit.
>
> I’ve edited /etc/security/limits.conf to set soft and hard limit
> to 20000 (just to check), but after login the soft limit stays at
> 1024.
>
> Using prlimit I can change the limits of a running process, but
> that is not passed on to subprocesses, which the app creates
> constantly for import, there, the soft limit returns to 1024 :(
>
> Running prlimit --nofile 20000 or prlimit --nofile 20000:20000
> does not work, either, the soft limit stays at 1024, and the
> import fails.
>
> Does anyone know a way to change the soft limit permenantly?
>

kernel code is buggy here, from a quick read you should be able to
work around it by:

sysctl compat.linux.default_openfiles=-1


-- 
Mateusz Guzik <mjguzik gmail.com>