2.2.32. How do I increase the inotify limit to get my filesystem watcher to work?
You are probably reading this because you encountered the following error with the filesystem watcher on linux:
Failed to start filesystem watcher for folder yourLabel (yourID): failed to setup inotify handler. Please increase inotify limits, seehttps://docs.syncthing.net/users/faq.html#inotify-limits
Linux typically restricts the amount of watches per user (usually 8192). When you have more directories you need to adjust that number.
On many Linux distributions you can run the following to fix it:
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
On Arch Linux and potentially others it is preferred to write this line into a separate file, i.e. you should run:
echo "fs.inotify.max_user_watches=204800" | sudo tee -a /etc/sysctl.d/90-override.conf
This only takes effect after a reboot. To adjust the limit immediately, run:
sudo sh-c 'echo 204800 > /proc/sys/fs/inotify/max_user_watches'