topic Re: kcore file on RedHat 7.2 in Operating System - Linux

kcore file on RedHat 7.2

B S_1 — Thu, 12 Dec 2002 13:03:18 GMT

Hello,
I have a kcore file under
/proc with 9 GB and still growing.
The Filesystem shows suddenly "100% used" and
i can't find big log files.

Any Idea.

Thank you in advance for any help.

Best Regards. Dietmar

Re: kcore file on RedHat 7.2

Hendra_3 — Thu, 12 Dec 2002 14:03:29 GMT

It's a virtual filesystem, and it does not use disk space.
better not delete this file.
Leave it there :)

Re: kcore file on RedHat 7.2

Hendra_3 — Thu, 12 Dec 2002 14:27:32 GMT

# ls -al /proc/kcore
-r-------- 1 root root 950185984 Dec 12 22:19 /proc/kcore
# du /proc/kcore
0 /proc/kcore

You see.
BTW, do you have 9 GB memory?
i think it will create around your memory size.

rgds,
hw

Re: kcore file on RedHat 7.2

Stuart Browne — Thu, 12 Dec 2002 23:24:49 GMT

Umm, yes.. It's a virtual file system which resides in memory, and shouldn't have any "space" that will show up in normal disk tools.

The Mount table should show something like "none on /proc type proc (rw)", and you shouldn't be able to create new files in the filesystems.

You won't be able to remove 'kcore', but you can zero it (>/proc/kcore). This will not serve any useful function however, but will not damage a running system.

The 'kcore' entry in the proc filesystem should be roughly the same size as the physical memory in your system (this is going by my memory). By looking at the values in /proc/meminfo, you'll see that it will be slightly larger..

If you want more information on the proc file system and it's purpose, you'll need to nose through the kernel documentation (in the 'kernel-doc' package). There's a file in that rpm that has all of the details about the PROC file system.

Re: kcore file on RedHat 7.2

B S_1 — Thu, 12 Dec 2002 23:45:25 GMT

First, thank's for the reply's.

After a reboot the filesystem
is in "old" condition again.

I found an entry in the log/
messages file:
linux kernel: lease timed out

The system works fine
again, i only have some problems with ldap.
Some User can't log in the
system anymore.

Regards Dietmar.

PS: The kcore file was about
900 MB, my mistake.

Re: kcore file on RedHat 7.2

U.SivaKumar_2 — Fri, 13 Dec 2002 04:52:18 GMT

Hi

/proc/kcore virtual file contains an image of the kernel's memory. It size depends on your system's memory in use at a given point of time. It's growth will never affect the system

regards,
U.SivaKumar