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IF: Understanding V$UNDOSTAT and DBA_HIST_UNDOSTAT Views (Doc ID 1951693.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 and later
Information in this document applies to any platform.
***Checked for relevance on 21-Jul-2017***

Goal

This document explains the dynamic performance views which contains information about the undo tablespace:

V$UNDOSTAT

and

DBA_HIST_UNDOSTAT

  

From 11g inwards, DBA_HIST_UNDOSTAT can be used without Diagnostic Pack License. Else, you would require the Diagnostic Pack License for accessing any data dictionary view with prefix DBA_HIST

 (This exception in 11g holds good for a few other views also, such as DBA_HIST_SNAPSHOT, DBA_HIST_DATABASE_INSTANCE, DBA_HIST_SNAP_ERROR, DBA_HIST_SEG_STAT and DBA_HIST_SEG_STAT_OBJ)

Solution

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In this Document
Goal
Solution
 Checking Runaway query from the V$UNDOSTAT or WRH$UNDOSTAT views:

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