In 11.5.9 strange error

Question

Hi,
When am trying to shut the instance I am getting following error.
ORA-01034: ORACLE not available
ORA-27123: unable to attach to shared memory segment
SVR4 Error: 13: Permission denied
Any ideas.Plz
With Regards,
Srnivasa

Answer 1

You are not connected to the user that started the database. Please verify the owner of the database processes. You can use the ipcs utility if on linux/unix to verify the owner. Please also verify the owner and permissions of the 'oracle' binary under the RDBMS Oracle Home bin directory to verify that it has the proper owner and permissions. This file should have the suid bit set in its permissions and must be owned by the proper group as well. It should appear something similar to this:
-rwsr-s--x 1 orahelp dba 96735691 Jun 17 2009 oracle
You can find the proper group by examining the 'config.c' file under the RDBMS Oracle Home rdbms/lib directory. It should look as follows:
/* $Header: config_ux.c 115.1 2004/03/27 07:17:12 hfux ship $ */
/* SS_DBA_GRP defines the UNIX group ID for sqldba adminstrative access. */
/* Refer to the Installation and User's Guide for further information. */
#define SS_DBA_GRP "dba"
#define SS_OPER_GRP "dba"
char *ss_dba_grp[] = {SS_DBA_GRP, SS_OPER_GRP};