ORA-00474: SMON process terminated with error

Hi,

Sometimes you can get ” ORA-00474: SMON process terminated with error ” error.

Details of error are as follows.

Errors in file /<path>/diag/rdbms/<db_name>/<oracle_sid>/trace/<oracle_sid>_smon_<pid>.trc (incident=<NNNNN>):
ORA-00600: internal error code, arguments: [13011], [351384], [146850571], [7], [146850571], [4], [], [], [], [], [], []

ORA-00474: SMON process terminated with error
PMON (ospid: <pid>): terminating the instance due to error 474
Instance terminated by PMON, pid = <pid>

You should rebuild corrupted indexes:

SQL> ALTER INDEX SMON_SCN_TIME_TIM_IDX REBUILD ONLINE;
SQL> ALTER INDEX SMON_SCN_TIME_SCN_IDX REBUILD  ONLINE;

Drop index and create them again.

SQL> DROP INDEX "SYS"."SMON_SCN_TIME_TIM_IDX";
SQL> DROP INDEX "SYS"."SMON_SCN_TIME_SCN_IDX";
SQL> CREATE UNIQUE INDEX "SYS"."SMON_SCN_TIME_TIM_IDX" ON "SYS"."SMON_SCN_TIME" ("TIME_MP") TABLESPACE SYSAUX;
SQL> CREATE UNIQUE INDEX "SYS"."SMON_SCN_TIME_SCN_IDX" ON "SYS"."SMON_SCN_TIME" ("SCN") TABLESPACE SYSAUX;

Execute the analyze table for SMON_SCN_TIME table.

SQL> ANALYZE TABLE SMON_SCN_TIME VALIDATE STRUCTURE CASCADE ONLINE;

Table analyzed.

If this problem is seen during database startup and there are lots of corruption, you should set the following parameters in init.ora parameter file.

*.undo_management='MANUAL'
*._allow_resetlogs_corruption=true
*._allow_error_simulation=true

Then startup database again.

If database has been start up, then you can remove the above parameters again.

The latest solution is startup or restart instance again.

Do you want to learn Oracle Database for Beginners, then read the following articles.

https://ittutorial.org/oracle-database-19c-tutorials-for-beginners/