Oracle11g 体系结构

----通过 v$parameter数据字典来查询oracle标准数据块的大小。 2 SYS@orcl> startup 3 ORACLE instance started. 4 5 Total System Global Area 1221992448 bytes 6 Fixed Size 1344596 bytes 7 Variable Size 771754924 bytes 8 Database Buffers 436207616 bytes 9 Redo Buffers 12685312 bytes 10 Database mounted. 11 Database opened. 12 SYS@orcl> col name format a30; 13 SYS@orcl> col value format a20; 14 SYS@orcl> select name,value from v$parameter where name=‘db_block_size‘; 15 16 NAME VALUE 17 ------------------------------ -------------------- 18 db_block_size 8192 19 20 SYS@orcl> show parameter db_block 21 22 NAME TYPE VALUE 23 ------------------------------------ ----------- ------------------------------ 24 db_block_buffers integer 0 25 db_block_checking string FALSE 26 db_block_checksum string TYPICAL 27 db_block_size integer 8192

二、2：数据区 extent

二、3：段  segment

二、4：表空间  tablespace

二、5： SYSTEM 表空间

  1 SYS@orcl> col table_name for a30;
  2 SYS@orcl> col comments for a30;
  3 SYS@orcl> select * from dict;
  4 
  5 TABLE_NAME                     COMMENTS
  6 ------------------------------ ------------------------------
  7 DBA_CONS_COLUMNS               Information about accessible c
  8                                olumns in constraint definitio
  9                                ns
 10 
 11 DBA_LOG_GROUP_COLUMNS          Information about columns in l
 12                                og group definitions
 13 
 14 DBA_LOBS                       Description of LOBs contained
 15                                in all tables
 16 
 17 DBA_CATALOG                    All database Tables, Views, Sy

二、6：SYSAUX 表空间

二、7：UODO 表空间

二、8：USERS 表空间

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Oracle11g 体系结构

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