topic Re: Maximum file parameter in Operating System - Linux

Maximum file parameter

Fadia Almarei — Thu, 16 Apr 2009 08:47:47 GMT

Dear All

we have a problem in maximum opened file , we set the parameter file-max = 65535 which the maximum ,but we still get the problem,that we exceed the maximum number , what should we do to solve this problem ?
BR

Re: Maximum file parameter

Ivan Ferreira — Thu, 16 Apr 2009 11:36:39 GMT

Maybe is a shell limit, check /etc/security/limits.conf

Re: Maximum file parameter

Fadia Almarei — Thu, 16 Apr 2009 11:59:08 GMT

no , i alrady change it on limit.conf file

Re: Maximum file parameter

Steven Schweda — Thu, 16 Apr 2009 14:00:19 GMT

> what should we do to solve this problem ?

Don't open so many files?

Close some files?

What, exactly, are you doing when you have
this problem? How many open files do you
have? (How many do you need?)

Re: Maximum file parameter

Bill McNAMARA_1 — Thu, 16 Apr 2009 14:55:53 GMT

what does ulimit return?

Re: Maximum file parameter

Bill McNAMARA_1 — Thu, 16 Apr 2009 14:56:48 GMT

try
ulimit -u unlimited

Re: Maximum file parameter

skt_skt — Thu, 16 Apr 2009 15:30:58 GMT

"parameter file-max"???

what change u made on /etc/security/limits.conf?

Re: Maximum file parameter

Fadia Almarei — Sun, 19 Apr 2009 05:22:59 GMT

this is what i chande in limits.conf file

* soft nofile 65535
* hard nofile 65535

ulimit -u gives
137215

ulimit -n gives
65535

Re: Maximum file parameter

skt_skt — Sun, 19 Apr 2009 12:31:21 GMT

In HP-UX nofiles is controlled by kernel parm maxfiles(soft)

#kmtune|grep maxf
maxfiles 2048 - 2048
maxfiles_lim 8192 Y 8192

#ulimit -a|grep nofiles
nofiles(descriptors) 2048

So in LINUX you may have somthing simialar and give a shot by changing fs.file-max. Your "soft nofile" and fs.file-max are possibly related.

# sysctl -a|grep -i fs.file-max
fs.file-max = 8192

Re: Maximum file parameter

Steven McCoy — Mon, 20 Apr 2009 14:13:49 GMT

After you change parameters in /etc/sysctl.conf, don't forget to run:

sysctl -p

Re: Maximum file parameter

Fadia Almarei — Tue, 21 Apr 2009 06:32:58 GMT

all the changes i made is correct also i increase the valuefor the parameter to be 1048576. but still we get the error message.any idea

Re: Maximum file parameter

Steven McCoy — Tue, 21 Apr 2009 10:24:49 GMT

Often times when you change those parameters you need to start a new session as the user running the application. Have you stopped the application, logged off the application user, logged in the application user (into a new session), and restarted the application?

A reboot really shouldn't be necessary, but have you tried one since making those changes?

You are sure you ran 'sysctl -p' when you updated the /etc/sysctl.conf file?

Re: Maximum file parameter

Fadia Almarei — Tue, 21 Apr 2009 10:35:32 GMT

am sure that the parameter is taken by the system , but i will try to do restart to the server to see the effect and inform you

Re: Maximum file parameter

skt_skt — Tue, 21 Apr 2009 13:53:23 GMT

go with restarting the application.. the changes are dynamic to the server ma not to the APP/DB.