Archiver Processes (ARCn) 归档进程 日志切换后,将重做日志文件复制到指定的存储设备 收集事务重做数据并将该数据传输到备用目标,DG使用这个进程 Daemon / Application processes守护/应用程序进程 2.2.3 网络监听进程 Listener 2.2.4 网格基础设备守护程序 Grid Infrastructure daemons /ASM与RAC/ 2.3 存储结构 2.3.1...
Also, the processes help perform two-phase commit for global transactions anywhere in the cluster so that an Oracle RAC database behaves as a single system to the externally coordinated distributed transactions. The GLOBAL_TXN_PROCESSES initialization parameter specifies the number of GTXn processes, ...
Coordinates consistent updates to a control file resource with its SGA counterpart on all instances in an Oracle RAC environment. The ACMS process works with a coordinating caller to ensure that an operation is executed on every instance in Oracle RAC despite failures. ACMS is the process in whic...
Oracle Real Application Clusters (Oracle RAC) 数据库的体系结构是由在分开的多台服务器计算机上运行的多个实例组成。它们都共享同一个数据库。服务器群集在一端表现为单个服务器,而在另一端则为最终用户和应用程序。此配置旨在实现高可用性,可伸缩性和高端的性能。 监听器是一个数据库服务器进程。它接收客户端请...
Oracle Real Application Clusters (Oracle RAC) 数据库的体系结构是由在分开的多台服务器计算机上运行的多个实例组成。它们都共享同一个数据库。服务器群集在一端表现为单个服务器,而在另一端则为最终用户和应用程序。此配置旨在实现高可用性,可伸缩性和高端的性能。
从Oracle 10g开始是有隐藏参数_high_priority_processes控制哪些进程是高优先级,19c参数中除了_high_priority_processes,还增加了_highest_priority_processes控制高优先级。在10.2版本中,Oracle缺少_high_priority_processes对RAC的核心进程LMS*设置高优先级,在11g版本中对LMS*|VKTM设置高优先级,在19c版本中_highest_pri...
从Oracle 10g开始是有隐藏参数_high_priority_processes控制哪些进程是高优先级,19c参数中除了_high_priority_processes,还增加了_highest_priority_processes控制高优先级。在10.2版本中,Oracle缺少_high_priority_processes对RAC的核心进程LMS*设置高优先级,在11g版本中对LMS*|VKTM设置高优先级,在19c版本中_highest_pri...
Typical Oracle RAC environments are run remotely. Database Instance Client Applications Processes SQL Database Server Database Instance System Global Area (SGA) Program Global Areas (PGAs) Maintains Maintains Server Processes Background Processes Maintains Database A database instance contains a set of ...
Provides an overview of Oracle Real Application Clusters (Oracle RAC) installation and administration, and various components and functions.
=> Performing instance recovery, if necessary, at instance startup. In an Oracle RAC database, the SMON process of one database instance can perform instance recovery for a failed instance. => Performs critical tasks such as instance recovery or crash recovery when the instance is started follo...