Oracle Shared Memory Segment Permission Changed in 12.2 and Starting With PSU

(Doc ID 2241468.1)

Last updated on OCTOBER 27, 2017

Applies to:

Oracle Database - Enterprise Edition - Version and later
Linux x86-64
IBM AIX on POWER Systems (64-bit)
Oracle Solaris on x86-64 (64-bit)
Oracle Solaris on SPARC (64-bit)
HP-UX Itanium


After Applying Oracle Database with July 2016 PSU/BP Shared Memory segment permission changed to 600(is no longer readable for the group but the owner)

$ ipcs -m

------ Shared Memory Segments --------

key        shmid      owner      perms      bytes      nattch     status    

0x00000000 22872084   oracle     640        12582912   21                     

0x00000000 22904853   oracle     640        721420288  21                     

0xd41b1c5c 22937622   oracle     640        2097152    21




Applying July2016 PSU or Upgrading to 


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms