"오라클 물리적 제한 사항"의 두 판 사이의 차이

1.1 Database Block Size[편집]

Minimum 2048 bytes; must be a multiple of operating system physical block size ==== Database Block Size ==== Maximum Operating system dependent; never more than 32 KB ==== Database Blocks ==== Minimum in initial extent of a segment 2 blocks ==== Database Blocks ==== Maximum per datafile Platform dependent; typically 222 - 1 blocks ==== Controlfiles ==== Number of control files 1 minimum; 2 or more (on separate devices) strongly recommended ==== Controlfiles ==== Size of a control file Dependent on operating system and database creation options; maximum of 25,000 x (database block size) ==== Database files ==== Maximum per tablespace Operating system dependent; usually 1022 ==== Database files ==== Maximum per database 65533 May be less on some operating systems

    Limited also by size of database blocks and by the DB_FILES initialization parameter for a particular instance

==== Database extents ==== Maximum per dictionary managed tablespace 4 GB * physical block size (with K/M modifier); 4 GB (without K/M modifier) ==== Database extents ==== Maximum per locally managed (uniform) tablespace 2 GB * physical block size (with K/M modifier); 2 GB (without K/M modifier) ==== Database file size ==== Maximum Operating system dependent. Limited by maximum operating system file size; typically 222 or 4 MB blocks ==== MAXEXTENTS ==== Default value Derived from tablespace default storage or DB_BLOCK_SIZE initialization parameter ==== MAXEXTENTS ==== Maximum Unlimited ==== Redo Log Files ==== Maximum number of logfiles Limited by value of MAXLOGFILES parameter in the CREATE DATABASE statement Control file can be resized to allow more entries; ultimately an operating system limit

==== Redo Log ==== Files Maximum number of logfiles per group Unlimited ==== Redo Log File Size ==== Minimum size 4 MB ==== Redo Log File Size ==== Maximum Size Operating system limit; typically 2 GB

1.2 Tablespaces[편집]

Maximum number per database 64 K Number of tablespaces cannot exceed the number of database files because each tablespace must include at least one file

1.3 Bigfile Tablespaces[편집]

	Number of blocks	A bigfile tablespace contains only one datafile or tempfile, which can contain up to approximately 4 billion ( 232 ) blocks. The maximum size of the single datafile or tempfile is 128 terabytes (TB) for a tablespace with 32 K blocks and 32 TB for a tablespace with 8 K blocks.

1.4 Smallfile (traditional) Tablespaces[편집]

Number of blocks A smallfile tablespace is a traditional Oracle tablespace, which can contain 1022 datafiles or tempfiles, each of which can contain up to approximately 4 million (222) blocks.

1.5 External Tables file[편집]

	Maximum size	Dependent on the operating system.

An external table can be composed of multiple files.