共享内存包含三部分：驻留区(Resident Portion), 虚拟区(Virtual Portion), 消息区(Message Portion)。以下内容无需深入了解。
基于24个网页-相关网页
The virtual portion is quite expandable by the database server and can be paged out to disk by the operating system.
虚拟区可以通过数据库服务器得到较大扩展，并且可以通过操作系统将虚拟区页移出(page out)磁盘。
Virtual memory segment: This virtual portion is used for maintaining and controlling the resources needed by processes.
虚拟内存段：虚拟区用于维护和控制进程所需的资源。
When the database server is online and performing operations, it automatically attaches additional operating-system segments to the virtual portion, if the initial size is too small.
当数据库服务器处于联机状态并执行操作时，如果虚拟区的初始尺寸太小，数据库服务器会自动向虚拟区附加其他操作系统段。
应用推荐