I'm currently facing a problem on a linux box where as root I have commands returning error because inotify watch limit has been reached.
# tail -f /var/log/messages [...] tail: cannot watch '/var/log/messages': No space left on device # inotifywatch -v /var/log/messages Establishing watches... Failed to watch /var/log/messages; upper limit on inotify watches reached! Please increase the amount of inotify watches allowed per user via '/proc/sys/fs/inotify/max_user_watches'.`
I googled a bit and every solution I found is to increase the limit with:
sudo sysctl fs.inotify.max_user_watches=<some random high number>
But I was unable to find any information of the consequences of raising that value. I guess the default kernel value was set for a reason but it seems to be inadequate for particular usages. (e.g., when using Dropbox with a large number of folder, or software that monitors a lot of files)
So here are my questions:
- Is it safe to raise that value and what would be the consequences of a too high value?
- Is there a way to find out what are the currently set watches and which process set them to be able to determine if the reached limit is not caused by a faulty software?