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  1. #1
    Join Date
    Mar 2011

    Unanswered: ORA-27100: Shared memory realm already exists

    I re-size MEMORY_MAX_TARGET using scope=spfile, when I shutdown it did correctly but when I tried to startup the database, it gives me this error: ORA-27100: Shared memory realm already exists without opening the database. How can resolve the error message and work with my database.

  2. #2
    Join Date
    Aug 2003
    Where the Surf Meets the Turf @Del Mar, CA
    Provided Answers: 1
    27100, 00000, "shared memory realm already exists"
    // *Cause: Tried to start duplicate instances, or tried to restart an
    //         instance that had not been properly shutdown
    // *Action: Use a different instance name, or cleanup the failed instance's
    //          SGA
    a system reboot might improve things for you.
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