[erlang-questions] system_limit and enfile errors when acceptiing/opening connections

Jesper Louis Andersen <>
Mon Aug 11 19:27:34 CEST 2008


On Mon, Aug 11, 2008 at 2:36 PM, Artak Avetisyan <> wrote:

> We are running Erlang R12 on FreeBSD 6.2-RELEASE, the kern.maxfiles
> limit is  8072 , and kern.maxfileperproc is 7264 per process, while
> fstat | grep beam | wc shows 1200 (way to low to get emfile or enfile
> anyway), however the web-service runs normally after a reboot.

While the kernel places an upper limit of 8072, the process might be
more limited than that. Take the shell-process executing the erl(1)
binary and try to run

ulimit -n (bash/zsh)

or

limits (csh/tcsh)

which will verify that you are not bumping your head against a
somewhat lower limit imposed there. Modulo some spurious extra
mappings in fstat(8) you might be hitting a 1024 limit there.



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