今天查看alert日志的时候发下如下错误信息：

Sat Nov 11 06:29:37 2017
Errors in file /u01/app/oracle/diag/rdbms/xxxxj002_38682.trc:
ORA-12012: error on auto execute of job “SYS”.”ORA$AT_SA_SPC_SY_6070”
ORA-01426: numeric overflow
ORA-06512: at “SYS.DBMS_ADVISOR”,line 201
ORA-06512: at “SYS.DBMS_SPACE”,line 2480
ORA-06512: at “SYS.DBMS_SPACE”,line 2560
Sat Nov 11 14:41:18 2017

查询和分析解决如下：

CHANGES
TRecently upgraded to 11.2.0.3. It used to work in 11.1.0.7 or earlier releases.

CAUSE
This is due to the bug 16621589. As per this bug,when the space advisor is running,calculation of uncompressed bytes from uncompressed blocks generated overflow. This is because the uncompresses bytes are stored in PLS_INTEGER storage data type and after internal multiplication and calculation,this datatype was not able to withhold the resultant value and is throwing the overflow error. The fix is to make data types of uncmp_bytes and cmp_bytes to use INTEGER instead of PLS_INTEGER.

SOLUTION
To resolve this issue:
- Upgrade the database to version 12.1.0.2 (and above) or 12.2 (future version) where this bug is fixed.
OR 下面
- Apply Patch 16621589.

OR

• As a workaround: Disable autospace advisor,if you are not using it,by executing the following steps: BEGIN DBMS_AUTO_TASK_ADMIN.DISABLE( client_name => ‘auto space advisor’,operation => NULL,window_name => NULL); END; /