V$UNDOSTAT MAXQUERYLEN Suddenly Appears With a High Value For a Simple Query
(Doc ID 1307600.1)
Last updated on JANUARY 01, 2020
Applies to:Oracle Database - Enterprise Edition - Version 10.1.0.2 to 188.8.131.52 [Release 10.1 to 11.2]
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Whilst monitoring the MAXQUERYLEN column of V$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.:
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