Oracle IM加载策略分几个级别
Oracle IM加载分如下级别,默认为PRIORITY NONE。
CREATE/ALTER Syntax | Description |
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The database populates the object on demand only. A full scan of the database object triggers the population of the object into the IM column store. This is the default level when |
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The database assigns the object a low priority and populates it after startup based on its position in the queue. Population does not depend on whether the object is accessed. The object is populated in the IM column store before database objects with the following priority level: |
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The database assigns the object a medium priority and populates it after startup based on its position in the queue. Population does not depend on whether the object is accessed. The database object is populated in the IM column store before database objects with the following priority levels: |
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The database assigns the object a high priority and populates it after startup based on its position in the queue. Population does not depend on whether the object is accessed. The database object's data is populated in the IM column store before database objects with the following priority levels: |
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The database assigns the object a low priority and populates it after startup based on its position in the queue. Population does not depend on whether the object is accessed. The database object's data is populated in the IM column store before database objects with the following priority levels: |
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