Oracle Error Message
ORA-09984: SGA file $ORACLE_HOME/dbs/sgadef$ORACLE_SID.dbf does not exist
Reason for the Error
file does not exist or is not accessible
Solution
Restart the instance to create the SGA definition file.
ORA-09984: SGA file $ORACLE_HOME/dbs/sgadef$ORACLE_SID.dbf does not exist
file does not exist or is not accessible
Restart the instance to create the SGA definition file.