SYSAUX表空間滿的解決方法

轉載自：https://www.cnblogs.com/yiyuf/p/4284448.html

 

step1.  確認到底是哪個段占用了sysaux空間：

select segment_name,sum(bytes)/1024/1024 from dba_segments where tablespace_name='SYSAUX' group by segment_name order by 2 desc

SEGMENT_NAME 　　　　　　　　　　　　　　SUM(BYTES)/1024/1024
WRH$_ACTIVE_SESSION_HISTORY 　　　　7360.375
WRH$_ACTIVE_SESSION_HISTORY_PK　　 1400.257

從上面看就是ASH（v$active_session_history）歷史記錄沒有清理造成

 

step2. 檢查有多少條無效記錄：

SQL> SELECT COUNT(1) Orphaned_ASH_Rows
 FROM wrh$_active_session_history a
 WHERE NOT EXISTS
 (SELECT 1
 FROM wrm$_snapshot
 WHERE snap_id = a.snap_id
 AND dbid = a.dbid
 AND instance_number = a.instance_number
 );

ORPHANED_ASH_ROWS
-----------------
23392228 

 

step3.清楚多余記錄，由於rows過多，清理速度有點慢。

SQL>DELETE FROM wrh$_active_session_history a
WHERE NOT EXISTS (SELECT 1
FROM wrm$_snapshot
WHERE snap_id = a.snap_id
AND dbid = a.dbid
AND instance_number = a.instance_number);

23392228 rows deleted.

SQL>commit;

期間需要注意歸檔日志的產生量，避免造成磁盤空間不足等麻煩。同時可以適當的多添加幾組redolog來加速delete操作。

 

step4. shrink tablespace

alter table WRH$_ACTIVE_SESSION_HISTORY shrink space;

 

step5. re-check

column OCCUPANT_NAME format a15
SELECT occupant_name,
occupant_desc,
space_usage_kbytes
FROM v$sysaux_occupants
WHERE occupant_name LIKE '%AWR%';

 

SELECT PARTITION_NAME FROM DBA_IND_PARTITIONS WHERE INDEX_NAME='WRH$_ACTIVE_SESSION_HISTORY_PK';

PARTITION_NAME
------------------------------
WRH$_EVENT_HISTO_MXDB_MXSN
WRH$_ACTIVE_2645903699_6157

step6 rebuild index

SQL> alter index sys.WRH$_ACTIVE_SESSION_HISTORY_PK rebuild partition WRH$_ACTIVE_2645903699_12505;

Index altered.

SQL> alter index sys.WRH$_ACTIVE_SESSION_HISTORY_PK rebuild partition WRH$_ACTIVE_2645903699_6157;

Index altered.