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  • 【翻译自mos文章】v$undostat视图没有依照每10分钟进行更新,v$undostat仅仅有1行(one rows)


    v$undostat视图没有依照每10分钟进行更新,v$undostat仅仅有1行(one rows)

    參考原文:
    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

    以上查询仅仅返回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.

    解决方式:

    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.

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  • 原文地址:https://www.cnblogs.com/mfrbuaa/p/4502774.html
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