How can I check how many open files are currently used?
Checking on PM2 is just an example:
I found the PID:
ps aux | grep pm2 | awk '{ print $2 }'
Checked that there is a limit of 65536 openfiles:
# cat /proc/16305/limits | grep 'Max open files'
Max open files 65536 65536 files
This limit is set via systemd:
# cat /etc/systemd/system/pm2.service.d/nofile_limit.conf
[Service]
LimitNOFILE=65536
I know that I can check how many files are open based on the user:
lsof -u UserName | wc -l
252
PM2 is running on diffrent user than PM2, and when I checked the limit on that user it is ridiculously small, so something is wrong here..
How can I check how many open files are currently used if the limit is set and managed by systemd?
When I wrote this post I came with idea, maybe this could be a solution to my own problem:
lsof | grep ' userName ' | awk '{print $NF}' | sort | wc -l
2348
What do you think?
Best Answer
If you want check for one process which you know pid try this