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Date: Thu, 8 Sep 2022 19:19:40 +0200
From: Mateusz Okulus <mmokulus@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] qbittorrent crashes after to many files open error
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> root@fireball / # sysctl fs.file-max
> fs.file-max = 3289952
> root@fireball / # sysctl -w fs.file-max=32899520
> fs.file-max = 32899520
> root@fireball / # cat /proc/sys/fs/file-max
> 32899520
On my pc the limit is 2^63. But this is max files for kernel, which is
different for max files per user and max files per process.
For example if I run:
$ grep 'Limit\|open' /proc/$(pgrep qbittorrent | head -1)/limits
Limit Soft Limit Hard Limit Units
Max open files 524288 524288 files
524288 = 2^19
QBittorrent increases it's process limit to hard limit. With 10 TB of
torrents it's hard to tell if it's a bug or just 500k files is not
enough, I'd say it's probably the latter.
It seems you can change the default hard limit in
/etc/security/limits.conf
For example:
# 2^24, increased from 2^19
* hard nofile 16777216
Then after reloging:
$ grep 'Limit\|open' /proc/$(pgrep qbittorrent | head -1)/limits
Limit Soft Limit Hard Limit Units
Max open files 16777216 16777216 files
So this works, at least for me.
Check also limits.conf man page.
Regards,
mmokulus