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V$UNDOSTAT MAXQUERYLEN Suddenly Appears With a High Value For a Simple Query (Doc ID 1307600.1)

Last updated on JANUARY 01, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 10.1.0.2 to 11.2.0.2 [Release 10.1 to 11.2]
Information in this document applies to any platform.



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Symptoms

Whilst monitoring the MAXQUERYLEN column of V$UNDOSTAT you suddenly see an entry appear with a high value which wasn't shown for the previous time period, and relates to a simple query which should execute relatively quickly, e.g.:

Cause

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In this Document
Symptoms
Cause
Solution


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