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SQL Query With Same Execution Plan is Taking Longer After DB Upgrade - More I/O is Seen (Doc ID 2872907.1)

Last updated on APRIL 17, 2023

Applies to:

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


After upgrading a Database from 12.1 to 19.11, it was noticed that a specific query is taking more time for execution in 19c.

-  Execution plan is same across the two versions.

-  However, the plan details show that more time is taken in 19c for the I/O:




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