Re: [gentoo-user] qbittorrent crashes after to many files open error

[Mateusz Okulus]

> 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