segmentation error (core dumped)

[Pradeep_7]

Hi,

I am using linux redhat 6.2. About once a week, our system is throwing the error :

segmentation error (Core dumped)

This error is shown when I try and execute any command after logging in. But, this is occured on and off... not contiuously.... after it started once...

I have Oracle running on this machine. Oracle do not allow and logins at this time or don't work properly at that time. Some times the listener fails. After a little while, Oracle shuts down automatically.


Could some one please help me, why does this error occur.

Thanks,
Deep.

[Michael Steele_2]

Please evaluate your core file this way:

file core

strings core > /tmp/file

-or-

strings core | more

Are you using X windows or a variant?

Listener will core dump.

[Pradeep_7]

HI,

I have evaluated the core file as mentioned. It seems pretty alright. It has all the environment variables.

CORE
CORE
racle/
CORE
netd
-1:-1:134540332
ul.KYt33YAL/:121
LESSOPEN=|/usr/bin/lesspipe.sh %s

These are the first few lines, which I didn;t understand.

We do run xwindows on this machine.

Please let me know, what should I do next.

Thanks,
Deep.

[Michael Steele_2]

Pradeep, please attach the file or paste in.

[Pradeep_7]

HI,

The core file is attached...

Thanks,
Deep.

[Michael Steele_2]

I don't know how to advise you except to say that its an oracle core file, check with oracle.

[david_69]

What is you memory usage like?

What does "sar" "vmstat" "free" show?

If you close to no mem free, then this could be the OOM Killer.

I strongly adive graphing you memory usage ( Used, Buffers, Cache) to get a better Idea of you memory usage.

check out:
http://www.quadratic.net/~david/gnuplot/index.php
(note the shameless self promotion)