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Nofiles & nproc change on RHEL not taking effect


 
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# 1  
Old 09-09-2013
Nofiles & nproc change on RHEL not taking effect

I am installing a statistical applicaton and for its web components it is a listed requirement that I have soft limits of files (20480) and no of processes (soft t o 10240). I am on RHEL 6.1.

As root I made the following changes in /etc/security/limits.conf
Code:
* soft nproc 10240
* hard nproc 35000
* soft nofile 20480
* hard nofile 60000

However my deployment keeps failing. On checking I see these values still
Code:
ulimit -a
core file size           (blocks, -c) 0
data seg size            (kbytes, -d) unlimited
scheduling priority      (-e) 0 
file size                (blocks, -f) unlimited 
pending signals          (-i) 62538
max locked memory        (kbytes, -l) 64
max memory size          (kbytes, -m) unlimited
open files               (-n) 20480   
pipe size                (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority       (-r) 0     
stack size               (kbytes, -s) 10240
cpu time                 (seconds, -t) unlimited
max user processes       (-u) 1024            #<---------this one wont chg
virtual memory           (kbytes, -v) unlimited 
file locks               (-x) unlimited

I log out, restart deployment from scratch but so far no good. I am not an admin so I am sure I am missing something.

I searched this forum but did not find much under nproc keyword search.

Thank you in advance,

Last edited by Scott; 09-09-2013 at 02:47 PM.. Reason: Code tags, please...
# 2  
Old 09-09-2013
See this redhat bugzilla links that addresses issues of this nature....
https://bugzilla.redhat.com/show_bug.cgi?id=157294
# 3  
Old 09-09-2013
Nofiles & nproc

Thank you for the answer and your time, I am indeed using ssh to access. I have no way to access the terminal directly...so now further will try to find out how to find if priv separation is indeed enabled and how to disable it. I did run the couple of cmds listed in the bug track:
Code:
ulimit -H -u = 35000 & ulimit -S -u 1024

were my outcomes.

TY again.

---------- Post updated at 01:46 PM ---------- Previous update was at 01:36 PM ----------

Did find /etc/ssh and sshd_config in there, the priv line is commented out...what does that mean?
Code:
#UsePrivilegeSeparation yes

I am afraid this where my any adv knowledge ends and do not want to mess things...if any could suggest what else to check...I would be grateful.

One question I did not ask, normally does one need to reboot server after limits.conf change? I read that it is not needed (RHEL 6.1/6.2)? That change is effective immediately.
# 4  
Old 09-09-2013
You should also have kernel.pid_max = 65535 in /etc/sysctl.conf (higher than the 35000 limit, and lower than 99999 to avoid problems with some tools).
And there are some tools that do not like the 35000 limit: e.g. sshd at least will take a long time to start/fork (time to close all 35000 file handles).

Last edited by MadeInGermany; 09-09-2013 at 04:39 PM..
# 5  
Old 09-09-2013
Thank you MIG, I checked in the file and that value currently is set to 64000.

Appreciate your time.
 

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