Tuesday, February 2, 2021

ORA-01034: ORACLE not available ORA-27101: shared memory realm does not exist

 When you were trying to connect to your Oracle database, you received the following errors.

ORA-01034: ORACLE not available

ORA-27101: shared memory realm does not exist

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3640

Additional information: 2007875791

Process ID: 0

Session ID: 0 Serial number: 0


Here are the steps to fix it.

SQL>sqlplus /NOLOG

SQL> connect / as sysdba;

SQL> SHUTDOWN IMMEDIATE

                 You may get the error message again. 

        ERROR:

         ORA-01034: ORACLE not available

        ORA-27101: shared memory realm does not exist

        Linux-x86_64 Error: 2: No such file or directory

        Additional information: 3640

        Additional information: 2007875791

        Process ID: 0

        Session ID: 0 Serial number: 0

SQL> STARTUP

ORACLE instance started.

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