ORA-27123 During Startup Nomount in 11G on AIX, Failure in SHMAT() (Doc ID 733974.1)

Last updated on FEBRUARY 25, 2015

Applies to:

Oracle Server - Enterprise Edition - Version: 11.1.0.6 and later   [Release: 11.1 and later ]
IBM AIX on POWER Systems (64-bit)
***Checked for relevance on 22-Dec-2011***

Symptoms

Creating the database after installing 11g on AIX6L fails with following errors:

SQL> startup nomount pfile="/oracle/db11g/admin/init.ora";
ORA-27123: unable to attach to shared memory segment
IBM AIX RISC System/6000 Error: 22: Invalid argument
Additional information: 7
Additional information: 67108867


Database creation using DBCA also fails with same error.

Cause

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