A database can have a mixture of Oracle-managed and unmanaged files. 对的 Enlarging the Database You can enlarge the database in the following ways: • Create a new tablespace. • Add a data file to an existing smallfile tablespace. • Increase the size of a data file. • Provide...
描述:逻辑存储结构(Logical Storage Structures)使 Oracle Database 能够对磁盘空间使用进行细粒度控制,此处从逻辑的角度分析Oracle数据库的组成包括方案(Schema)、数据块(Data Block)、区间(Extent)、段(Segment)、表(Table)和表空间(Tablespace)等知识。 关系:数据库由若干个表空间组成,表空间由又由多个段组成,段由...
database tablespace segment extent block 3.2.1 表空间和数据文件 数据在物理上是存储在数据文件(data files)上,从逻辑上看数据存储在段(通常是表)中。 表空间是二者的抽象,是一个逻辑的概念 早期数据库中表、索引等对象(段)和文件(data file)之间是一对一的关系,缺点是当表比较多时,不便于系统管理员管理,...
Database Storage Structures A database can be considered from both a physical and logical perspective. Physical data is data viewable at the operating system level. For example, operating system utilities such as the Linuxlsandpscan list database files and processes. Logical data such as a table...
A-14 Oracle Automatic Storage Management: Oracle By Example Series ... A-14 Index xii List of Figures 6–1 6–2 11–1 Oracle Database Storage Structures ... 6-2 Online Redo Log Groups and Their Members ...
在官网看到了这段信息,讲的很细。 贴过来。Logical Storage StructuresOracleDatabase manages the logical storage space in the data files of a database in units called data blocks, also calledOracleblocks or oracle ide
Chapter 4. Oracle Data Structures In the previous chapters, we examined some distinctions between the different components that make up an Oracle Database. For example, we pointed out that the Oracle instance differs from the files that make up the physical storage of the data in tablespaces, ...
发出CREATE DATABASE或CREATE CONTROLFILE语句时,MAXDATAFILES参数指定控制文件的数据文件部分的初始大小。但是,如果尝试添加数量大于MAXDATAFILES但小于或等于DB_FILES的新文件,则控制文件将自动展开,以便数据文件部分可以容纳更多文件。 确定DB_FILES 初始化参数的值 ...
Exadata Database Machine X11M is based on a unique, scale-out architecture that integrates the latest AMD EPYC processors in database servers and intelligent storage servers to provide higher per-core performance than previous-generation platforms. Intelligent storage servers offload SQL and AI Vector...
In this example, Oracle Database will use only one additional byte to store information and will require 2+1=3 bytes of storage. To understand the impact of Oracle's efficient internal storage structures on real world data, it is important to remember that even without compression there are ...