How to fix the Oracle error ORA-09984: SGA file $ORACLE_HOME/dbs/sgadef$ORACLE_SID.dbf does not exist?

In this post, you’ll learn more about the Oracle ErrorORA-09984: SGA file $ORACLE_HOME/dbs/sgadef$ORACLE_SID.dbf does not exist with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-09984: SGA file $ORACLE_HOME/dbs/sgadef$ORACLE_SID.dbf does not exist

Reason for the Error ORA-09984: SGA file $ORACLE_HOME/dbs/sgadef$ORACLE_SID.dbf does not exist

file does not exist or is not accessible

How to fix the Error ORA-09984: SGA file $ORACLE_HOME/dbs/sgadef$ORACLE_SID.dbf does not exist ?

You can fix this error in Oracle by following the below steps

Restart the instance to create the SGA definition file.