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SQL Ran From 1min To 50min After 19c Upgrade And Stops Using Parallel Execution (Doc ID 2877745.1)

Last updated on JANUARY 17, 2023

Applies to:

Oracle Database - Enterprise Edition - Version 19.7.0.0.0 and later
Information in this document applies to any platform.

Symptoms

After upgrade from 12c performance of a SQL decreased and started executing anywhere from 1min to 50 min instead of seconds that it took back in 12c. See SQLT Output below:

Changes

 Change here was upgrade from 12c to 19.7.

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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