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ORA-27126 During Database Startup After Install Of Patchset On AIX5L (Doc ID 603489.1)

Last updated on FEBRUARY 21, 2019

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
IBM AIX on POWER Systems (64-bit)
IBM AIX Based Systems (64-bit)
This issue may occur on Oracle RDBMS version running on AIX 5L platform.
***Checked for relevance on 20-12-2012***


Following error occurs during database startup immediately after patching a OracleHome from 10.2.0.x to

SQL*Plus: Release - Production on Mon Jun 9 14:32:37 2008

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SQL> conn /as sysdba
Connected to an idle instance.
ORA-27126: unable to lock shared memory segment in core
IBM AIX RISC System/6000 Error: 1: Not owner

This database has initialization parameter LOCK_SGA=TRUE.
Error ORA-27126 does not appear when LOCK_SGA parameter set to FALSE.


The Oracle Home binaries have been patched to 


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