You’d need to look for a segment with no attached processes (NATTACH=0). It’s a
dead segment that can be removed with ipcrm.
IPC status from <running system> as of Thu Feb 7 16:34:40 MET 2019
T ID KEY MODE OWNER GROUP CREATOR CGROUP
NATTCH SEGSZ CPID LPID ATIME DTIME CTIME
Shared Memory:
m 1560281188 0x2a54d290 --rw------- oracle dba oracle dba
453 28672 8707 24484 16:34:33 16:34:33 8:47:09
m 905969763 0x0 --rw------- oracle dba oracle dba
453 329252864 8707 24484 16:34:33 16:34:33 8:47:09
…
Best regards,
Nenad
https://nenadnoveljic.com/blog/
From: oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> On Behalf
Of Jeff Chirco
Sent: Donnerstag, 7. Februar 2019 16:33
To: Mark W. Farnham <mwf@xxxxxxxx>
Cc: oracle-l-freelist <oracle-l@xxxxxxxxxxxxx>
Subject: Re: clone creations fails with shared memory realm already exists
Hi Mark not sure what to look for with that. There is 22 other databases
running on this server. Its a dev server with a bunch of clones and little use.
On Wed, Feb 6, 2019 at 7:41 PM Mark W. Farnham
<mwf@xxxxxxxx<mailto:mwf@xxxxxxxx>> wrote:
see what ipcs –m says is allocated.
From: oracle-l-bounce@xxxxxxxxxxxxx<mailto:oracle-l-bounce@xxxxxxxxxxxxx>
[mailto:oracle-l-bounce@xxxxxxxxxxxxx<mailto:oracle-l-bounce@xxxxxxxxxxxxx>] On
Behalf Of Jeff Chirco
Sent: Wednesday, February 06, 2019 10:05 PM
To: oracle-l-freelist
Subject: clone creations fails with shared memory realm already exists
Ok I am confused. I am trying to make a thin clone of our database from one
server to another. Something I have done many times. I use NetApp Snap Manager
for Oracle. Oracle EE 12.2.0.1 running on Oracle Linux 7. The clone process is
failing with ORA-27100: shared memory realm already exists.
This database does not currently exist. I ran a ps -ef | grep for my database
name and no process are found. There is nothing in /etc/oratab. I've tried
adding an entry to make sure a database with that name is not running. There
is no pfile, spfile, password file. I've checked /dev/shm for any files
related to my database name and there is nothing. I don't understand by it
thinks shared memory realm already exists.
Any suggestions?
Thanks,
Jeff
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