There are two ways to use dynamic sampling:
- The OPTIMIZER_DYNAMIC_SAMPLING parameter can be set at the database instance level and can also be overridden at the session level with the ALTER SESSION command.
- The DYNAMIC_SAMPLING query hint can be added to specific queries.
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/27378/viewspace-559814/ ，如需转载，请注明出处，否则将追究法律责任。
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