知识大全 Oracle9i New Features

Posted 2022-07-15 数据库

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　　原文链接　　　　a /　　是编号为A 文档的概括　　前些天看到有人问 I的新功能就随手翻译了一下有的地方不准确或者是错误的大家多包涵不清楚的地方请参考文档谢谢　　　　Oracle i Release ( ) New Features　　Oracle i brings a major new release of the Oracle database server It includ　　es features to make the database more available More online operations reduce the need for offline maintenance Management of the database requires less effort Oracle i can automatically create and manage the underlying operating system files required by the database There is a theme of self management 　　Oracle i带来了一次Oracle数据库服务器的主要升级它包括了可以使数据库更可靠更多的在线操作替代了离线维护管理数据库更有效的新特性 Oracle i自动管理数据库需要的操作系统文件这是自动管理的主题　　　　Performance is enhanced The Database Resource Manager has new options that allow for more granular control of resources The performance level required of a resource consumer group can be better sustained Partitioning enhancements allow tables and indexes to be better partitioned for performance Security enhancements are an important part of this release Applications have available more and finer grained methods of implementing security and auditing 　　　　性能得到增强数据库资源管理器拥有新的选项允许对资源进行更好的控制一组资源消费所要求的性能水平可以得到持续满足分区增强允许表和索引为性能更好的分区安全增强是这次升级的重要部分应用程序拥有更多更好的执行安全和审计的方法　　　　The following are summaries of the new features of Oracle i that are discussed in this book 　　下面是Oracle i新特性的总结　　　　Online redefinition of tables　　The new DBMS_REDEFINITION PL/SQL package provides a mechanism to redefine ta　　bles online When a table is redefined online it is accessible to DML durin　　g much of the redefinition process This provides a significant increase in 　　availability pared to traditional methods of redefining tables that require tables to be taken offline 　　在线重定义表　　新的PL/SQL包DBMS_REDEFINITION提供了在线重定义表的机制当表被在线重定义的时候在重定义进程中的大多数时刻对DML是可用的与传统的要求表先离线再重新定义的方法相比显著地提高了可用性　　　　ONLINE option for ANALYZE VALIDATE STRUCTURE statement　　The ANALYZE statement can now perform validation while DML is ongoing within the object being analyzed 　　 ANALYZE VALIDATE STRUCTURE语句的ONLINE选项　　ANALYZE语句现在可以在DML运行的时候提供确认当目标正在分析的时候　　　　Controlling Archive Log　　Oracle now provides a time based means of switching the current online redo log group In a primary/standby configuration where all noncurrent logs of the primary site are archived and shipped to the standby database this effectively limits the number of redo records as measured in time that will not be applied in the standby database 　　控制归档日志　　Oracle现在提供一种基于时间的方法用来切换目前的在线redo log组在primary/standby配置中既所有主站点非当前日志都被归档并传到standby数据库中它有效地限制了重做记录的数量从时间上考虑它不使用在standby database上　　　　Suspending a database　　Oracle i includes a database suspend/resume feature The ALTER SYSTEM SUSPEND statement suspends a database by halting all input and output (I/O) to dat　　afiles and control files When the database is suspended all preexisting I/O　　 operations are allowed to plete and any new database accesses are placed in a queued state The ALTER SYSTEM RESUME statement resumes normal databas　　e operation 　　挂起数据库　　Oracle包括数据库挂起/恢复特性 ALTER SYSTEM SUSPEND语句通过暂停所有对数据文件和控制文件的输入输出（I/O）挂起数据库当数据库被挂起时所有先前存在的I/ 操作被允许执行完毕并且任何新的请求被放在一个状态队列中 ALTER SYSTEM RESUME语句恢复正常的数据库操作　　　　Quiescing a database　　Oracle i allows you to place the database into a quiesced state where only DBA transactions queries or PL/SQL statements are allowed This quiesced state allows you to perform administrative actions that cannot safely be done　　 otherwise The ALTER SYSTEM QUIESCE RESTRICTED statement places a database into a quiesced state　　禁用数据库　　Oracle i允许拥护将数据库置于一个禁用状态只有DBA事务查询或者PL/SQL语句可以执行这个状态允许用户进行在其他情况下不能保证安全的管理工作 ALTER SYSTEM QUIESCE RESTRICTED语句将数据库设置为禁用状态　　　　Resumable Space Allocation　　Oracle provides a means for suspending and later resuming the execution of　　 large database operations in the event of space allocation failures This enables you to take corrective action instead of the Oracle database server returning an error to the user After the error condition is corrected the suspended operation automatically resumes 　　空间分配可恢复　　当大型数据库操作在空间分配阶段失败时 Oracle提供了一种先挂起一段时间后恢复执行的机制它可以允许纠正操作代替数据库返回用户一个错误当错误状态被纠正时挂起的操作自动恢复　　　　More archiving destinations　　The maximum number of destinations to which you can archive the online redo 　　log has been increased from to 　　更多的归档目标文件　　归档重做日志所用的目标文件的最大数量从个增加到个　　　　Automatic segment space management Locally managed tablespaces allow extents to be managed automatically by Oracle Oracle i allows free and used space within segments stored in locally managed tablespaces to also be managed automatically Using the SEGMENT SPACE　　 MANAGEMENT clause of CREATE TABLESPACE you specify AUTO or MANUAL to specify the type of segment space management Oracle will use 　　自动分段——空间管理　　本地管理的表空间允许扩展段由Oracle自动管理 Oracle i也允许本地表空间段中的free和used空间自动管理使用CREATE TABLESPACE的SEGMENT SPACE MANAGEMENT子句通过设置AUTO或MANUAL确定Oracle用来管理段空间所使用的方法　　　　Update of global indexes when partition maintenance is performed By default many table maintenance operations on partitioned tables invalida　　te (mark UNUSABLE) global indexes You must then rebuild the entire global i　　ndex or if partitioned all of its partitions Oracle i allows you to override this default behavior When you specify the UPDATE GLOBAL INDEX clause in your ALTER TABLE statement for the maintenance operation the global index is updated in conjunction with the base table operation 　　维护分区的时候更新全局索引　　在缺省情况下许多在分区表上进行的表维护操作使全局索引无效（标志为UNUSABLE）用户必须重建全部的全局索引或者在在分区的情况下全部它的分区 Oracle i允许用户使其无效当用户在维护操作的ALTER TABLE语句中声明UPDATE GLOBAL INDEX子句时全局索引和基表操作一起更新　　　　Multiple block sizes　　Oracle now supports multiple block sizes It has a standard block size as s　　et by the DB_BLOCK_SIZE initialization parameter and additionally up to n　　onstandard block sizes Nonstandard block sizes are specified when creating 　　tablespaces The standard block size is used for the SYSTEM tablespace and most other tablespaces Multiple block size support allows for the transporting of tablespaces with unlike block sizes beeen databases 　　块大小多样化　　Oracle现在支持多种块的尺寸数据块具有一个标准的大小建立表空间时在DB_BLOCK_SIZE初始化参数中设置标准块大小用于SYSTEM表空间和大多数其他表空间多样化的块大小允许数据库间具有不同块大小的表空间传输　　　　Dynamic buffer cache　　The size of the buffer cache subponent of the System Global Area is now dynamic The DB_BLOCK_BUFFERS initialization parameter ha cha138/Article/program/Oracle/201311/18924