此组件提供分析数据库服务器性能所需的共享内存缓冲区信息。
This component provides the Shared memory buffer-related information required to analyze the database server performance.
检查点是指数据库服务器在特定的时间点对磁盘上的页面和共享内存缓冲区中的页面进行同步。
A checkpoint refers to a point when the database server synchronizes the pages on disk with the pages in the shared-memory buffers.
通信区包含本地客户机应用程序的消息缓冲区，这些应用程序使用共享内存与数据库服务器进行通信。
The communications portion contains the message buffers for local client applications that use shared memory to communicate with the database server.
注意：通常，当一个结点有故障，如果使用共享内存或磁盘缓冲区，第二个结点接管时数据都被丢弃。
NOTE: In general, note that should a node fail if shared memory or disk buffering is used then this data will be lost when the second node takes over.
注意：通常，当一个结点有故障，如果使用共享内存或磁盘缓冲区，第二个结点接管时数据都被丢弃。
NOTE: In general, note that should a node fail if shared memory or disk buffering is used then this data will be lost when the second node takes over.
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