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【翻译自mos文章】v$undostat视图没有按照每10分钟进行更新,v$u

程序员文章站 2022-04-25 22:39:20
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v$undostat视图没有按照每10分钟进行更新,v$undostat只有1行(one rows) 参考原文: The V$UNDOSTAT view is not getting updated in every 10 minutes. (Doc ID 1206365.1) 适用于: Oracle Server - Enterprise Edition - Version: 10.2.0.1 and later [

v$undostat视图没有按照每10分钟进行更新,v$undostat只有1行(one rows)

参考原文:
The V$UNDOSTAT view is not getting updated in every 10 minutes. (Doc ID 1206365.1)

适用于:
Oracle Server - Enterprise Edition - Version: 10.2.0.1 and later [Release: 10.2 and later ]
Information in this document applies to any platform.

症状:
The V$UNDOSTAT view is not getting updated every 10 minutes.

SQL> select BEGIN_TIME,END_TIME, UNDOBLKS from v$undostat;

BEGIN_TIME END_TIME UNDOBLKS
-------------------- -------------------- ----------
21-aug-2010 03:48:44 07-sep-2010 11:02:14 75016989

以上查询只返回1行。

变化:
SQL> sho parameter undo

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
_in_memory_undo boolean FALSE
_undo_autotune boolean FALSE --->注意此行记录。
undo_management string AUTO
undo_retention integer 3600
undo_tablespace string UNDOTBS1

The parameter "_undo_autotune" has been set to FALSE.
This has disabled automatic undo tuning.

解决方案:

设置"_undo_autotune" parameter to TRUE:

SQL> alter system set "_undo_autotune"=true;

This disables the standard tracking of UNDO statistics in V$UNDOSTAT. You can see only the one row of data as noted in this case.