SQL> SET LINES 120 SQL> COL OCCUPANT_NAME FORMAT A30 SQL> SELECT OCCUPANT_NAME,SPACE_USAGE_KBYTES FROM V$SYSAUX_OCCUPANTS ORDER BY SPACE_USAGE_KBYTES DESC; OCCUPANT_NAME SPACE_USAGE_KBYTES ------------------------------ ------------------ SM/ADVISOR 5901376 SM/OPTSTAT 574080 SQL> COL SEGMENT_NAME FORMAT A30 SQL> COL OWNER FORMAT A10 SQL> COL TABLESPACE_NAME FORMAT A10 SQL> COL SEGMENT_TYPE FORMAT A15 SQL> SELECT * FROM (SELECT SEGMENT_NAME,OWNER,TABLESPACE_NAME,BYTES/1024/1024 "SIZE(MB)",SEGMENT_TYPE FROM DBA_SEGMENTS WHERE TABLESPACE_NAME='SYSAUX' ORDER BY BYTES DESC) WHERE ROWNUM<=10; SEGMENT_NAME OWNER TABLESPACE SIZE(MB) SEGMENT_TYPE ------------------------------ ---------- ---------- ---------- --------------- WRI$_ADV_OBJECTS SYS SYSAUX 3600 TABLE WRI$_ADV_OBJECTS_IDX_01 SYS SYSAUX 1400 INDEX HEAT_MAP SYS SYSAUX 600 TABLE
a. 重创建表
CREATE TABLE WRI$_OPTSTAT_HISTGRM_HISTORY_B AS SELECT * FROM WRI$_OPTSTAT_HISTGRM_HISTORY ; TRUNCATE TABLE WRI$_OPTSTAT_HISTGRM_HISTORY ; INSERT INTO WRI$_OPTSTAT_HISTGRM_HISTORY SELECT * FROM WRI$_OPTSTAT_HISTGRM_HISTORY_B; COMMIT; drop table WRI$_OPTSTAT_HISTGRM_HISTORY_B purge;
alter table WRI$_OPTSTAT_HISTHEAD_HISTORY move; 文档ID 454678.1
alter index xxx rebuild online ;
AUTO_STATS_ADVISOR_TASK 任务运行了很多次导致SYSAUX表空间增长迅速。
例如:
SQL> COL TASK_NAME FORMAT A35 SQL> SELECT TASK_NAME, COUNT(*) CNT FROM DBA_ADVISOR_OBJECTS GROUP BY TASK_NAME ORDER BY CNT DESC; TASK_NAME CNT ----------------------------------- ---------- AUTO_STATS_ADVISOR_TASK 27082431 SYS_AUTO_SPM_EVOLVE_TASK 19 SYS_AUTO_SQL_TUNING_TASK 39
解决办法：
1. 这个自动运行的任务(AUTO_STATS_ADVISOR_TASK) 可以被删除进而释放它占用的大量空间。
DECLARE v_tname VARCHAR2(32767); BEGIN v_tname := 'AUTO_STATS_ADVISOR_TASK'; DBMS_STATS.DROP_ADVISOR_TASK(v_tname); END; /
一旦任务被删除，所有依赖Auto Stats Advisor Task的相关历史输出信息将从WRI$_ADV_OBJECTS表中一并删除。
删除任务AUTO_STATS_ADVISOR_TASK可能引发如下报错：
如果上述报错出现，可以用下面的方法重建AUTO_STATS_ADVISOR_TASK来解决：
SQL> connect / as sysdba SQL> EXEC DBMS_STATS.INIT_PACKAGE();
删除任务之后，重组表和所有索引：
SQL> ALTER TABLE WRI$_ADV_OBJECTS MOVE; SQL> ALTER INDEX WRI$_ADV_OBJECTS_IDX_01 REBUILD; SQL> ALTER INDEX WRI$_ADV_OBJECTS_PK REBUILD;
2.如果表WRI$_ADV_OBJECTS中有太多和Auto Stats Advisor Task相关的记录，删除任务时可能会需要大量undo空间.
一旦发生此状况，如下方法可以用来直接清理数据而避免产生大量redo 和undo信息。
SQL> SELECT COUNT(*) FROM WRI$_ADV_OBJECTS WHERE TASK_ID=(SELECT DISTINCT ID FROM WRI$_ADV_TASKS WHERE NAME='AUTO_STATS_ADVISOR_TASK');
SQL> CREATE TABLE WRI$_ADV_OBJECTS_NEW AS SELECT * FROM WRI$_ADV_OBJECTS WHERE TASK_ID !=(SELECT DISTINCT ID FROM WRI$_ADV_TASKS WHERE NAME='AUTO_STATS_ADVISOR_TASK');
### 截断原表 ###
SQL> TRUNCATE TABLE WRI$_ADV_OBJECTS;
### 把备份表中数据插回原表 ###
SQL> INSERT /*+ APPEND */ INTO WRI$_ADV_OBJECTS SELECT * FROM WRI$_ADV_OBJECTS_NEW;
### 重建索引 ###
SQL> ALTER INDEX WRI$_ADV_OBJECTS_IDX_01 REBUILD;
SQL> ALTER INDEX WRI$_ADV_OBJECTS_PK REBUILD;
P.S: 表 WRI$_ADV_OBJECTS_NEW在上述命令都成功执行后可删除。
从数据字典删除统计信息任务，避免再次造成问题。
DECLARE v_tname VARCHAR2(32767); BEGIN v_tname := 'AUTO_STATS_ADVISOR_TASK'; DBMS_STATS.DROP_ADVISOR_TASK(v_tname); END; /
DBA可以在任何时间重建统计信息顾问任务 (AUTO_STATS_ADVISOR_TASK)，具体参考如下办法：
SQL> EXEC DBMS_STATS.INIT_PACKAGE();
DECLARE filter1 CLOB; BEGIN filter1 := DBMS_STATS.CONFIGURE_ADVISOR_RULE_FILTER('AUTO_STATS_ADVISOR_TASK','EXECUTE',NULL,'DISABLE'); END; /
新的增强补丁已经被申请，将会提供更方便的方法来禁用这个任务。
Unpublished Bug 26749785 NEED TO HAVE MORE CONTROL IN DICTIONARY FOR AUTO_STATS_ADVISOR_TASK
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