Comments (8)
beikeland
commented on August 15, 2024
1
Oddly enough raising the limit to 512k seems to have a positive effect. Will persist the change and see if it the effect persists.
sudo bash -c 'echo "fs.inotify.max_user_watches=524288" >> /etc/sysctl.conf'
It's not spam when it's educational ;) :)
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wilriker
commented on August 15, 2024
Not sure how this is done in Debian but on Arch Linux /run is of type tmpfs (i.e. similar to a ramdisk) and as such shares space with all other tmpfs-typed mounts. The only one really using up space usually is /tmp. Can you check with
df -h
how much space is available and if my assumption is correct that /tmp is holding all the space can you also check what uses all the space in there?
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beikeland
commented on August 15, 2024
similar, and there is plenty of space
pi@duet3:~ $ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/root 15G 1.9G 13G 14% /
devtmpfs 459M 0 459M 0% /dev
tmpfs 464M 0 464M 0% /dev/shm
tmpfs 464M 12M 452M 3% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 464M 0 464M 0% /sys/fs/cgroup
/dev/mmcblk0p1 44M 23M 21M 52% /boot
tmpfs 93M 0 93M 0% /run/user/1000
Google seems to suggest it could be related to number of inodes being able to be watched, but not my area of expertise. I just find it strange it only applies to the webserver. Its not an actual problem, but maybe something worth being aware of before it turns into a problem when released to the masses.
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wilriker
commented on August 15, 2024
Can you check with
cat /proc/sys/fs/inotify/max_user_watches
how many watches are configured and with
sudo lsof -K | grep inotify | less
(you might need to install lsof) what uses up all of these? I am no where near the limit (on my machine 512K watches allowed vs. ~30 watches active).
EDIT: This might need to be configured differently and as such go into the installation instructions.
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beikeland
commented on August 15, 2024
Less configured, but about same amount used (varied around 30-40-ish), mostly DuetWebServer. And should be plenty free.
pi@duet3:~ $ cat /proc/sys/fs/inotify/max_user_watches
8192
$ sudo lsof -K | grep inotify
sd-resolv 280 326 systemd-timesync 11r a_inode 0,11 0 5804 inotify
gmain 2416 2417 root 8r a_inode 0,11 0 5804 inotify
gmain 2416 2417 root 9r a_inode 0,11 0 5804 inotify
gdbus 2416 2419 root 8r a_inode 0,11 0 5804 inotify
gdbus 2416 2419 root 9r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5337 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5337 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5338 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5338 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5339 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5339 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5340 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5340 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5341 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5341 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5342 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5342 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5343 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5343 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5344 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5344 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5345 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5345 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5350 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5350 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5353 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5353 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5354 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5354 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5359 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 5359 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 9660 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 9660 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 9881 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 9881 root 99r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 9917 root 95r a_inode 0,11 0 5804 inotify
DuetWebSe 5333 9917 root 99r a_inode 0,11 0 5804 inotify
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wilriker
commented on August 15, 2024
Wow, 8K that is... crazy low default value. Still, as you said, this should be plenty.
I have not yet seen this message on my Arch Pi but then again I cannot run DuetWebServer as systemd unit in the first place. Strange. Now I stop spamming. ;-)
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wilriker
commented on August 15, 2024
This might be related to my latest findings in #29.
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chrishamm
commented on August 15, 2024
Should be fixed in DWS 1.1.0.0 - it's probably related to the amount of inotify items.
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