Generally, it does this by maintaining awareness or state of the mapped entity class instances it is responsible for by keeping a first-level cache of instances, valid for a single thread.

通常，它通过保留对单个线程有效的一级缓存实例，维护它负责的映射实体类实例的可识别性或状态，从而做到这一点。

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Flush and clear your first-level session cache periodically as in the following batch insert sample.

像如下范例中那样定期刷新(flush)并清除一级会话缓存。

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