How To Configure Automatic Purge(Drop) Of SQL Plan Baseline(SPM).
Last updated on NOVEMBER 16, 2016
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 to 22.214.171.124B1 [Release 11.2 to 12.1]
Information in this document applies to any platform.
From Oracle 11g Release 1, "SQL Plan Management" (SPM) records and evaluates the execution plans of SQL statements over time to maintain and manage Plan Stability. This mechanism can build a SQL plan baseline, which is a set of accepted plans for a SQL statement.
This article looks at the configuration and retention of plan baseline.
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