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Linux, resouce temporarily unavailable

I am running RHEL 6.2

I am getting the following problem:

[root@nevada02 ~]# su - mqm
su: cannot set user id: Resource temporarily unavailable
[root@nevada02 ~]#

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I check some resources, but everything seems fine

[root@nevada02 ~]# free -m
             total       used       free     shared    buffers     cached
Mem:         96722       9524      87198          0         72       5295
-/+ buffers/cache:       4156      92566
Swap:        66411          0      66411
[root@nevada02 ~]#
[root@nevada02 ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
                      51606140  12805392  36179308  27% /
tmpfs                 49522152         0  49522152   0% /dev/shm
/dev/sda2               495844     62353    407891  14% /boot
/dev/sda1               204580       256    204324   1% /boot/efi
                      21867732   8830052  11926848  43% /home

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What should I investigate
Los Angeles1
Los Angeles1
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1 Solution
Please do 'ulimit -a', 'ps -U mqm | wc -l', 'lsof | grep mqm | wc -l' and paste the results.

Also, check in /etc/security/limits.conf
Los Angeles1Author Commented:
Here it is:

[root@hostname02 log]# 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) 773633
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
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
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
[root@hostname02 log]#
[root@hostname02 log]#
[root@hostname02 log]# ps -U mqm | wc -l
[root@hostname02 log]#
[root@hostname02 log]#
[root@hostname02 log]# lsof | grep mqm | wc -l
[root@hostname02 log]#

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The max open files limit is set to 1024 but mqm is over that at 1412.
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