OceanBase 数据库 SQL 型 V4.3.4 参考指南 系统视图 Oracle 租户系统视图 字典视图 DBA_WR_CONTROL 更新时间:2025-01-16 10:49:43 编辑 说明 该视图从 V4.2.1 版本开始引入。 功能描述 展示WR 相关的配置信息。 字段说明 字段类型是否为 NULL描述 ...
OceanBase 数据库 SQL 型 V4.3.2 参考指南 系统视图 Oracle 租户系统视图 字典视图 DBA_WR_CONTROL 更新时间:2025-01-16 10:44:28 编辑 说明 该视图从 V4.2.1 版本开始引入。 功能描述 展示WR 相关的配置信息。 字段说明 字段类型是否为 NULL描述 ...
定义为”ON”,则任意一次RMAN备份都会自动备份controlfile,比如备份tablespace; 定义为”OFF”,则不会自动备份controlfile,需要手动备份。 使用RMAN工具备份controflile的命令如下 #rman target / RMAN>backup current controlfile; 使用RMAN备份集恢复controlfile的步骤如下 #rman target / RMAN>startup nomount RMAN>...
ALTERDATABASEOPEN; --Commands to add tempfiles to temporary tablespaces. --Online tempfiles have complete space information. --Other tempfiles may require adjustment. ALTERTABLESPACETEMPADDTEMPFILE'/u01/app/oracle/oradata/orcl/temp02.dbf' SIZE26214400REUSE AUTOEXTENDONNEXT5242880MAXSIZE104857600; --E...
IndexMO methodMultiversion controlOptimistic methodTransaction一、引言并发控制是DBMS中关键的一项技术,其所采用的算法直接影响着DBMS的效率。并发控制涉及到很多对象,包括数据字典、普通数据、存储过程以及索引等等。其中,索引的并发是随着并发粒度的下降而提出的。并发粒度是衡量DBMS并发效率的重要指标,它指的是DBMS中...
1. Where the controlfiles are placed: Are all in the same disk? control_files +REDO01/<instance_name>/controlfile/current.256.856619303, +REDO02/spppr01/controlfile/current.256.856619303 2. Size of the control files SQL> SELECT name FROM gv$controlfile; ...
Introduction to Concurrency Control in DBMS Concurrency control in DBMS is an important concept that is related to the transactions and data consistency of the database management systems. Concurrency control refers to the process of managing independent operations of the database that are simultaneous ...
The AlternC control panel includes exhaustive help files for its API, allowing for a smooth and painless interface modification. While AlternC was originally written in French, an English translation is also available in the Debian package. And it can also be translated into any other language. ...
Enterprise Architect's version control system allows for storing in any compliant system of standard XMI text files. These may then be versioned and distributed to developers, analysts, managers and team members in general, either for inclusion in privately assembled models ("private mode") or as...
When more than one transactions are running simultaneously there are chances of a conflict to occur which can leave database to an inconsistent state. To handle these conflicts we need concurrency control in DBMS, which allows transactions to run simulta