Comments on: Linux Increase The Maximum Number Of Open Files / File Descriptors (FD)

By: mrcool

mrcool — Mon, 26 Dec 2011 07:40:43 +0000

u must edit config file ,if u increase the file descriptor value through the terminal means it shold be a temporary only ,if u want to permanently increase your ulimit mean u have to set the ulimit in config file. . . .

By: Soham

Soham — Thu, 08 Dec 2011 10:30:39 +0000

Try in /etc/security/limits.conf file and at the end of the file add this.

* – nofile

Logout and login again and check ulimit -n

By: Killjoy

Killjoy — Wed, 23 Nov 2011 19:13:05 +0000

Nice one, worked fine for me too on Debian 6.

By: kamalakar

kamalakar — Tue, 01 Nov 2011 12:55:51 +0000

I am trying to increase ulimit on Ubuntu
even after restarting changes are not reflected

By: Nick

Nick — Wed, 26 Oct 2011 01:05:35 +0000

You could also try

ulimit -n xxxxx now

where xxxxx is the number, e.g. 16384. Worked for me on CentOS 5.7.

By: Leonardo

Leonardo — Tue, 27 Sep 2011 17:10:00 +0000

Hi,

Worked in RH 5.

It´s very important to know if you have set the max-files for user xx, you must to start the application with the user xx…. if you are starting with another user, the changes does not effetct.

By: khupcom

khupcom — Wed, 21 Sep 2011 03:19:38 +0000

Not working on my centos box.
# su – nginx
# ulimit -Hn
1024
# ulimit -Sn
1024

By: Mukesh

Mukesh — Tue, 06 Sep 2011 07:44:46 +0000

Thanks, it worked for me on Red Hat Linux 5.

By: pep

pep — Thu, 12 May 2011 10:51:56 +0000

Could you please let me know , while we change the ulimit for root using “ulimit -n” , which is the configuration file in which it reflects.

By: cgrinds

cgrinds — Mon, 25 Apr 2011 21:35:41 +0000

If you have cPanel, check /etc/profile.d/limits.sh. Although you shouldn’t change it here it’s possibly the root cause of your changes not sticking.

By: Thamizhannal

Thamizhannal — Wed, 23 Mar 2011 10:01:56 +0000

Excluding operating system process(es), if any application runs on muti user mode and does not close the opened file, then it would create this issue. Please make sure that if any external application(may be your own’s or deployed one) runs on muti user mode and closed all the files it has opened if any.

By: Marco Smith

Marco Smith — Wed, 23 Mar 2011 09:32:57 +0000

And what if you run, multi user mode from console, i.e without Windows X? Like for instance, what process/processes run that makes the number on increase SO high….like from 160 to 900 open files????

By: Vivek Gite

Vivek Gite — Wed, 23 Mar 2011 09:27:44 +0000

More users + More process + More background process == More open files

By: Marco Smith

Marco Smith — Wed, 23 Mar 2011 08:13:24 +0000

Hi, Can someone please tell me why the amount of open files increase so rapidly when changing from Single user mode to multi user mode?

By: Terry Antonio

Terry Antonio — Tue, 25 Jan 2011 00:22:53 +0000

Good Day Mate
I was going to leave you in my will for this but the mortgage payments might be to high.
Anyway long story short I run free radius and on a new server i built and it constantly reports “no db handles” if you check with the freeradius forum this is a common problem and is usually met with the kurt reply “figure out whats using all the descriptors”.
I had in my mind I had encountered this problem many years ago and it was a matter of increasing the system handles but just could not track it down.
From your article I found my mysql handles were set at 1024 I increased the soft limit to 5000 and the hl to 10000 and all is well in paradise again. Your bloods worth bottling
Cheers Terry

By: jee

jee — Sun, 02 Jan 2011 16:19:33 +0000

I have a problem about “too many open file “, i had changed all parameters,

but this problem is exist.

My system have a web application system, that have a dongle, I guess the problem

maybe caused by dongle .

Can you help me , thank you !

By: Joel

Joel — Tue, 14 Dec 2010 10:18:42 +0000

In the end, it suddenly worked, without changing anything more. How much time is needed before it’s taken into account? Strange and unreliable…

By: Joel

Joel — Tue, 14 Dec 2010 10:15:25 +0000

I’m using Linux (Debian Lenny) on a server. I would like to keep my ulimit -n settings.
The values in /etc/security/limits.conf (soft and hard limits) and in /etc/sysctl.conf have been increased.
/etc/pam.d/login constains the “session required pam_limits.so”
I’ve also put the “ulimit -n 50000″ command in .bashrc
… and after logout/login and/or ssh, ulimit -n still returns 1024! What tricky settings also need to be changed? These incoherent and over-complicated version-dependent settings really make linux unusable. I’d rather write code than waste my time on linux configuration files.

By: Dirk

Dirk — Sat, 11 Sep 2010 10:02:03 +0000

Hi Francisco,

when I issue “ulimit -n -H” on Mac OS X 10.6, it says “unlimited”. So I guess you don’t have to worry about it.

Dirk

By: Francisco

Francisco — Wed, 08 Sep 2010 21:15:32 +0000

Is there any equivalent for MAC OS x (darwin) ??