How To Force Direct Path Read for SQL Statements
(Doc ID 2426051.1)
Last updated on MAY 09, 2021
Applies to:Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
There are ways to disable direct path read for SQL statements as follows:
1. event 10949 level 1
2. _serial_direct_read = NEVER
However, there are no direct methods to force the direct path read operations which are faster for some SQL statements.
Sometimes, the same SQL that used to run in direct path read suddenly changed to conventional cache reads causing slow performance.
Goal of this document is to provide a method to force direct path read for such SQL statements.
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