ulimit mysterious

linux_us · 08-10-2012, 05:31 PM

OS: RHEL5.5
KERNEL: 2.6.18-194.26.1.el

On my server, the CPU time is 300 second:
$ ulimit -t
300

But by default it should be "unlimited" for cpu time in RHEL5, right?

I checked my server, there is no entry in /etc/security/limits.conf, no user profile to limit CPU time, and no system wide profile to limit cpu time,
and I didn't find anything /etc/sysctl.conf.
So I don;t know where the "cpu time" 300 seconds comes from.

Any ideas where else to define system resouce limit?

Thanks.

unSpawn · 08-10-2012, 07:18 PM

Quote:

Originally Posted by linux_us

OS: RHEL5.5

RHEL-5 is currently at U8.

Quote:

Originally Posted by linux_us

Any ideas where else to define system resouce limit?

Tried 'grep ulimit -r /etc/'?

linux_us · 08-10-2012, 08:11 PM

I did the following, nothing found.
find /etc -type f -exec grep ulimit {} \;
and
find /etc -type f -exec grep limit {} \;

Any more ideas?

unSpawn · 08-11-2012, 05:14 AM

Quote:

Originally Posted by linux_us

find /etc -type f -exec grep ulimit {} \;

If grep encounters the search term it also prints the file name.
If you use grep the way you do you should add "-H" to make it efficient.

Quote:

Originally Posted by linux_us

Any more ideas?

Just set it in /etc/security/limits.conf?

Reuti · 08-13-2012, 07:58 AM

IS this only the softlimit or also the hardlimit?

Code:

$ ulimit -Ht
$ ulimit -St

linux_us · 08-13-2012, 04:00 PM

It's only for soft limit, not hard limit.
$ ulimit -Ht
unlimited
$ ulimit -St
300

Reuti · 08-13-2012, 04:07 PM

Mayb it’s set in any of the ~/.bashrc, ~/.profile or ~/.bash_profile files. As it’s only a soft limit, it should also be possible to increase it again.

linux_us · 08-13-2012, 05:58 PM

# find /etc -type f -exec grep -H ulimit {} \;
/etc/profile:ulimit -S -c 0 > /dev/null 2>&1
/etc/rc.d/init.d/mdmpd: ulimit -S -c 0 >/dev/null 2>&1
/etc/rc.d/init.d/functions: corelimit="ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}"

and there is no user profile, so I'm just wondering where is the 300 comes from.

Reuti · 08-13-2012, 06:44 PM

Any other file in /etc/security/limits.d/?

linux_us · 08-13-2012, 06:52 PM

Nothing found.

$ cd /etc/security/limits.d
$ ls
$ ls -la
total 4
drwxr-xr-x 2 root root 1024 Oct 21 2010 .
drwxr-xr-x 5 root root 1024 Aug 13 17:48 ..
$