更新统计数据是最重要的管理任务之一，它确保优化器选用最佳的查询执行计划。

Updating statistics is one of the most important administrative tasks that ensure the optimizer picks optimum execution plans for your queries.

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上面的suma命令将返回一个suma任务ID，稍后在执行计划任务的立即下载时会使用到这个任务ID。

The above suma command will return a suma task ID that might later be used to perform an immediate download of a schedule task.

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您可能希望重新部署应用程序，以避免因执行计划的维护任务而造成的停机时间，或者通过将应用程序移动到一台功能更强大的服务器来提高性能。

You might want to relocate applications to avoid downtime resulting from scheduled maintenance or to improve performance by moving an application to a more powerful server.

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