ORA-27101: handling of shared memory realm does not exist errors

Handling of ORA-27101: shared memory realm does not exist Error

ORA-01034 and ORA-27101 error messages when I try to connect to the database, it always displays such information, "ORA-01034-Oracle not available" and "ORA-27101-shared memory realm does not exist ".

Cannot connect to my Oracle database.

Because the firewall encountered a lot of problems, this time we should first look at it and find that there is no interception at all. After checking the listener, the database instance is also running.

The strange thing is that it was okay just now. It won't work if the machine is restarted. The problem is solved when the Internet is searched.

The solution is not troublesome...

First, take a look at the ORADIM. LOG File under ORACLE_BASE \ ORACLE_HOME \ DATABASE

If this error occurs

ORA-12640: failed to verify adapter Initialization

Then the problem is him.

Find the sqlnet. ora file under ORACLE_BASE \ ORACLE_HOME \ NETWORK \ ADMIN.

Change sqlnet. authentication_services = (CNT)

Sqlnet. authentication_services = (NONE)

Then manually restart your database service .. choose Start> Control Panel> Administrative Tools> service and change the startup account of this service to your account... in fact, there is no problem if you do not change it. I didn't change it ..

After reading this method, there are two possible causes of errors: Account Modification and some instance changes.