Re: ORA-27100: shared memory realm already exists - status

>> How did Oracle know that the "shared memory realm already exists"?

Oracle knows this because it attaches to a segment based on the hash value of $ORACLE_HOME and $ORACLE_SID. In that segment the $ORACLE_HOME and $ORACLE_SID are stored, so that oracle can see to which instance they belong.

Anjo.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Tuesday, March 18, 2003 4:14 PM

> Thanks for all of the replies.
>
> I discovered that ipcs -mo will give me the number of
> current processes connected to the memory segment. The
> "dead" segments left by the instance which was giving me problems
> all had 0 in that column. The segment for the live instance
> had about 14 processes connected.
>
> I then used ipcrm -m <segment id> to delete the dead segments
> and restarted the database.
>
> Now to figure out why the instance is failing to clean up these
> memory segments.
>
> How did Oracle know that the "shared memory realm already exists"?
>
> Peter Schauss
> Northrop Grumman Corporation
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Schauss, Peter
> INET: pschauss_at_northropgrumman.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Anjo Kolk
  INET: anjo_at_oraperf.com

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