DB_FILES 是 Oracle 比较重要的一个参数,当你的数据量不太大的时候(大概 5TB以内,200*30G),这个参数不用修改是没有问题的,但你不能保证这个库以后的数据增长量不大于5TB,所以一般在建库的时候随着其他核心参数一起调整了, 但这个库是前人 19年创建的,参数几乎都是默认值,也由于当时数据量较少的缘故,所以到...
这是来自oracle官方的一篇文章。 文章里面有这样的一句话‘The BYTES column in DBA_DATA_FILES has a value greater than MAXBYTES column when a datafile was manually resized to a value GREATER than MAXSIZE (MAXBYTES).’ 描述: 当一个datafile 手工resize到一个大于maxsize(maxbytes)的值之后,DBA_DATA...
Starting inOracle8 the controlfile is automatically expanded. A new datafile is addedbeyond the maxdatafiles limited specified in the control file. --从Oracle 8 开始,控制文件是自动扩展的,当新添加的datafile时,datafile的个数超过了控制空maxdatafiles 参数的限制时,maxdatafiles参数值会自动的增加。 --...
Databases, tablespaces, and datafiles are closely related, but they have important differences:An Oracle database consists of one or more logical storage units called tablespaces, which collectively store all of the database's data. Each tablespace in an Oracle database consists of one or more ...
这是来自oracle官方的一篇文章。 文章里面有这样的一句话‘The BYTES column in DBA_DATA_FILES has a value greater than MAXBYTES column when a datafile was manually resized to a value GREATER than MAXSIZE (MAXBYTES).’ 描述: 当一个datafile 手工resize到一个大于maxsize(maxbytes)的值之后,DBA_DATA...
Oracle Database 23ai: AI Made Simple for Enterprise (7:11) Announcing Oracle DatabaseWorld: Multicloud AI Edition Join us at the free in-person event in New York City on May 7, or virtually on June 17, to discover how you can advance your AI and multicloud strategies with Oracle’s ...
Oracle Database In-Memory(In-Memory数据库)最先是在Oracle Database 12c第1版(12.1.0.2)中引入的功能,可大大提高实时分析和混合工作负载的性能。 In-Memory列存储(IM列存储)是Database In-Memory的关键功能。 分析应用程序的挑战 传统方面,为分析查询获得良好的性能意味着能够满足许多要求。
Oracle Exadata Exascale, the world’s only intelligent data architecture for cloud, provides extreme performance for AI, analytics, and mission-critical workloads at any scale. Its affordable scalability lets organizations of any size gain full Exadata benefits when running Oracle Database in the cloud...
1 Oracle Database In-Memory 相关概念 接上期:第一章 Oracle Database In-Memory 相关概念(IM-1.1) 提高混合工作负载的性能 虽然OLTP应用程序不能从IM列存储中访问数据,但双内存(dual-memory)格式可以间接提高OLTP性能。 当所有数据存储在行(rows)中时,提高分析查询性能需要创建访问结构。 标准方法是创建分析索引...
■ Automatic Storage Management—This option enables you to place your data files in Oracle Automatic Storage Management (Oracle ASM) disk groups. If you choose Oracle ASM, then Oracle Database automatically manages database file placement and naming. For environments with a large number of disks,...