monitor number of open files on linux

[Parkman, Mikhail]

Thanks - I decided to go with check_open_files.pl
http://exchange.nagios.org/directory/Plugins/Uncategorized/Operating-Systems/Linux/check-open-files/details

I didn't find help_me/read_me info for this plugin.
After I installed it on the target box into /usr/local/nagios/libexec and just executed it, I got:
----------
[root at target_host libexec]# ./check_open_files.pl
Usage:  -w <warn> -c <crit> [-t <timeout>] [-v version] [-h help]
[root at target_host libexec]#
======
That told me that I should run it at least with "-w some_value1 -c some_value2"
Then I tried to run it with different -w -c values and I am not clear why I am getting different threshold values (bold, red) :
===============
[root@ target_host libexec]# ./check_open_files.pl  -w 500 -c 10000
OK: open files (4590) is below threshold (16194515/323890300)|open_files=4590;16194515;323890300
[root@ target_host libexec]# ./check_open_files.pl -w 1000 -c 10000
OK: open files (4590) is below threshold (32389030/323890300)|open_files=4590;32389030;323890300
[root@ target_host libexec]# ./check_open_files.pl -w 10 -c 100
OK: open files (4590) is below threshold (323890/3238903)|open_files=4590;323890;3238903
===============
Why do I get in response 2 threshold values and why are they different each time I enter another number of warning and critical limits?
===============
By the way, total system files limits on the target box is:

 [root@ target_host libexec]# cat /proc/sys/fs/file-max
3238903
===============
Thanks.
-----Original Message-----
From: Edwin Zoeller [mailto:Edwin.Zoeller at ama-assn.org]<mailto:[mailto:Edwin.Zoeller at ama-assn.org]>
Sent: Friday, June 08, 2012 8:47 AM
To: Nagios Users List
Subject: Re: [Nagios-users] monitor number of open files on linux

Check_open_files.pl

-----Original Message-----
From: Parkman, Mikhail [mailto:Mikhail_Parkman at cable.comcast.com]<mailto:[mailto:Mikhail_Parkman at cable.comcast.com]>
Sent: Friday, June 08, 2012 10:20 AM
To: Nagios Users List
Subject: [Nagios-users] monitor number of open files on linux

Can somebody recommend plugin to monitor number of opened files.

Thanks.


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