Increase open files limit

[Max.Henri]

Hello all,

I am pretty new to Linux, so I apologize if this is elementary
I would like to know if there is a way to increase open files limit for my processes on the Asuswrt Merlin firmware? I have a process which keeps crashing due to this. As far as I can see, it's limited to 1024.

 

[ColinTaylor]

It depends on what the process is. You might be able to put a "ulimit" command in its startup script.

See here (http://www.snbforums.com/threads/how-to-adblock-plus-filters-right-on-router.9449/page-6#post-174831) for a similar discussion.

 

[Max.Henri]

Got it. ulimit -n 2048 to get it to 2048 instead of 1024. Now I just have to finde a place for it in my scripts

 

[Max.Henri]

Guess I was too quick. Resets to 1024 once I close the terminal. All the conventional solutions like editing /etc/security/limits.conf or sysctl doesn't seem to be available, since those files aren't on the router.

 

[ColinTaylor]

Guess I was too quick. Resets to 1024 once I close the terminal.

That's why I said you have to put it in the startup script of your program (which you haven't specified, so I can't help you on that).

 

[Max.Henri]

That's why I said you have to put it in the startup script of your program (which you haven't specified, so I can't help you on that).

I am sorry I totally missed that. The program in question is NZBGet. Now I have used the entware package for it, instead of the official version, and gotten a startup script for it in init.d. I added ulimit -n 2048 and ulimit -s 2048 to the end of the script, and I have added to /jffs/scripts/post-mount
sleep 30
/opt/etc/init.d/rc.unslung restart

But the script didn't run when the router booted up, so I ran the /opt/etc/init.d/rc.unslung restart in ssh, but ulimit -a shows no changes still.

 

[ColinTaylor]

and gotten a startup script for it in init.d. I added ulimit -n 2048 and ulimit -s 2048 to the end of the script, and I have added to /jffs/scripts/post-mount
sleep 30
/opt/etc/init.d/rc.unslung restart

But the script didn't run when the router booted up, so I ran the /opt/etc/init.d/rc.unslung restart in ssh, but ulimit -a shows no changes still.

I don't use Entware so I can only offer guesses.

1) Typing "ulimit -a" will only show you the settings that apply to your current shell. It does not show you the values applied to other running processes or system-wide. So it might actually be working. Are you seeing any errors?

2) If the script isn't running at boot time then that's a problem.

2) Are you editing /opt/etc/init.d/S75nzbget? If so, "ulimit -n 2048" should be before the line that says ". /opt/etc/init.d/rc.func", not after.

 

[Max.Henri]

Yea the script isn't running at boot. The daemon doesn't start, and I checked the /proc/<pid>/limits, and it's still 1024 for the process. I did set the ulimit -n 2048 before ". /opt/etc/init.d/rc.func". But it appears the problem is fixed by running the entware package version of nzbget, instead of the latest version, so I can stick with that at least

 

[ColinTaylor]

OK Thanks for the update although I don't really follow what you've done

You say the daemon doesn't start, yet you're checking its /proc/<pid>/limits? You also said in post #6 that you're using the entware package of NZBGet but now you're saying you were running the non-entware version.

Never mind though, so long as it's working.

All the best.