【摘要】 实时数据库系统（ＲＴＤＢＳ）的高性能要求以内存数据库（ＭＭＤＢ）做底层支持．内存数据库事务在运行过程中没有内外存数据Ｉ／Ｏ，这就要求对事务的执行进行预分析处理并在此基础上合理进行内外存数据交换．文中以正在开发的一个实时数据库系统为原型，对数据库的内外存数据交换的策略、方法、进行了探讨，并提出了一种评价交换策略的标准．更多还原

【Abstract】 The high performance of real time database system(RTDBS) requires that the main memory database(MMDB) be the base for it. There is no data I/O during the execution of transactions in MMDB. This makes it necessary for us to pre analyze the transactions and then to swap the data between main memory and external storage properly. In this paper, the strategy and method for data swapping in MMDB are discussed, and a standard to evaluate the swapping strategies is brought forward.更多还原