这些数据库调用会显示在序列图中，并且还会显示每次数据库访问的响应时间。

These database calls are shown in the sequence diagram along with the response time for each database hit.

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必须谨慎使用悲观会话锁定，因为它在业务流程（包括用户思考时间）中序列化数据访问。

Pessimistic session locking should be used with great discretion, as it serializes access to data across a business process that includes user think time.

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