1, DBCC PINTABLE Marks a table to be pinned, which means Microsoft SQL Server does not flush the pages for the table from memory.

将SQL Server数据表驻留内存是SQL Server提供功能，在般小型系统开发过程估计很少会涉及到。

In this model, every PC machine may logout at any time and thus may result in pintable, so the model must be adjusted by itself instantly to adapter itself to the changes.

由于P2P传输模型，PC机都有可能随时退出，容易造成系统不稳定。