topic Re: shared memory attach error in Operating System - Linux

shared memory attach error

Vimala L — Fri, 30 Aug 2002 07:33:32 GMT

Hello there.

I have Redhat linux 7.3 installed on a Pentium III 500MHz m/c. I have 320MB physical RAM and configured 1.9GB of swap space.

I try to install oracle 9i and it gives me error message ORA-27123 which is related to shmat().

I'm interested in knowing that if shmat() fails which commands should I use to provide global permissions.

Thank you,
Vimala.
30-Aug-2002

ORA-27123 detail message:
27123, 00000, "unable to attach to shared memory segment"
// *Cause: shmat() call failed
// *Action: check permissions on segment, contact Oracle support

Re: shared memory attach error

I_M — Fri, 30 Aug 2002 07:46:20 GMT

Hi

Have you re-compile your kernel follow the oracle's guide?

And do you know 9i support RH7.3?

Good luck

Re: shared memory attach error

U.SivaKumar_2 — Fri, 30 Aug 2002 09:25:59 GMT

hi,
do this As root:
# echo `expr 1024 \* 1024 \* 1024` > /proc/sys/kernel/shmmax
It is recommended to increase the shmmax setting permanently for Oracle. So if you want to increase the maximum shared memory size permanently, add the following line to the /etc/sysctl.conf file:
kernel.shmmax=1073741824

regards,
U.SivaKumar