ORA-03113: END-OF-FILE ON COMMUNICATION CHANNEL
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ERROR
SQL> connect / as sysdba
Connected to an idle instance.
SQL> startup;
ORACLE instance started.
Total System Global Area 1987563520 bytes
Fixed Size 2214696 bytes
Variable Size 1040188632 bytes
Database Buffers 939524096 bytes
Redo Buffers 5636096 bytes
Database mounted.
ORA-03113: end-of-file on communication channel
Process ID: 5114
Session ID: 191 Serial number: 3
SOLUTION
Connect to the RMAN, and delete archive log older than a week.
$rman target /
RMAN> startup mount;
RMAN> delete archivelog until time “sysdate-7”;
OR
RMAN> delete force archivelog all;
OR
RMAN> delete backup completed before “sysdate-3”;