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I have my rlimit_files set to 65535 yet when I run lsof -c php-fpm | wc -l I get 218k results.

How is this possible? I never noticed any big issues but I wonder if should increase it?

I even had this in my systemd already LimitNOFILE=150000, but I guess this only apply to the main pid not the children ?

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1 Answer 1

Reset to default
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From the documentation:

rlimit_files Set open file descriptor rlimit for the master process.

It is a per-process limit, and your lsof command counts all files for all matching processes, including memory-mapped files like shared libraries that don't count towards rlimit_files. You need to use something like lsof -a -c php-fpm -d^mem,^txt,^cwd,^rtd,^DEL.

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  • Thanks for you command. May I ask what it does? it seems my highest value is 31k so I should be safe Commented Aug 24 at 0:24
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    The command does the same as yours, but excludes files that don't count toward rlimit_files. Commented Aug 24 at 6:51

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