Has anyone had any experience with the following error in Red Hat Linux?

Kernel panic - not syncing: Out of memory and no killable processes error
and system is frozen and has to be hard rebooted.

cat /etc/redhat-release output is:
Red Hat Enterprise Linux ES release 4 (Nahant Update 4).

uname -a output is:
Linux timmon1.corp.bcbsks.com 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:27:17 EDT
2006 i686 i686 i386 GNU/Linux

I have a screen print of the console when it's frozen, but didn't know
about attaching a graphic to a question.  I also have a meminfo.out file
and sysreport output that I can send if anyone thinks that would be
helpful.  We've changed the setting for lower_zone_protection as
recommended from Red Hat and it's not having any impact on this problem
occuring.

Setting change from Red Hat:
echo 100 > /proc/sys/vm/lower_zone_protection

We've had this problem occur off and on with both of our Red Hat systems,
but this one in particular has been having a major problem the last week
and has been locking up about 3 times a day.  We use the Linux systems with
our CA Wily product for monitoring on the network.

The top command right now shows this output:
top - 12:44:49 up  2:16,  1 user,  load average: 0.42, 0.21, 0.17
Tasks:  73 total,   1 running,  72 sleeping,   0 stopped,   0 zombie
Cpu(s): 23.2% us,  0.3% sy,  0.0% ni, 64.6% id, 11.8% wa,  0.0% hi,  0.0%
si
Mem:   4144696k total,  1137308k used,  3007388k free,      448k buffers%
Swap:  4088532k total,        0k used,  4088532k free,    41672k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 4256 root      16   0  470m 204m 9204 S   94  5.1  36:01.64 tim
 3271 apache    16   0 13164 7068 3052 S    0  0.2   0:01.41 httpd

And the system just locked up on me again...3rd time today.

Any thoughts or ideas of where to look would be appreciated.

Thanks!

Joell Chockley
System Capacity/Performance Specialist
Blue Cross Blue Shield of KS
1133 Topeka Blvd
Topeka, KS  66629-0001
Work (785)291-7837



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