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SQL Slow After Upgrade to 19.15 Waiting on CPU (Doc ID 2892584.1)

Last updated on APRIL 17, 2023

Applies to:

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


SQL waiting on mostly on CPU with small waits appearing on PGA Memory Operation and SQL execution plan is showing Full Table Scans even though indexes are created.

SQL Slower after upgrade from previous version to 19.15.

NLS_SORT set to something other than BINARY at a system level.


Upgrade from previous version, in this case it was 12.2 to 19.15.


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