SYSAUX表空间简介

SYSAUX表空间在Oracle Database 10g中引入,作为SYSTEM表空间的辅助表空间.

以前一些使用独立表空间或系统表空间的数据库组件现在在SYSAUX表空间中创建.
通过分离这些组件和功能，SYSTEM表空间的负荷得以减轻.反复创建一些相关对象及组件引起SYSTEM表空间的碎片问题得以避免。

如果SYSAUX表空间不可用,数据库核心功能将保持有效;使用SYSAUX表空间的特点将会失败或功能受限.

我们看一下数据库创建脚本：

CREATE DATABASE "eygle"
MAXINSTANCES 8
MAXLOGHISTORY 1
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
DATAFILE '/opt/oracle/oradata/eygle/system01.dbf'
SIZE 300M REUSE AUTOEXTEND ON NEXT 10240K MAXSIZE UNLIMITED
EXTENT MANAGEMENT LOCAL
SYSAUX DATAFILE '/opt/oracle/oradata/eygle/sysaux01.dbf'
SIZE 120M REUSE AUTOEXTEND ON NEXT 10240K MAXSIZE UNLIMITED--SYSAUX表空间的创建
DEFAULT TEMPORARY TABLESPACE TEMP
TEMPFILE '/opt/oracle/oradata/eygle/temp01.dbf' SIZE 20M REUSE
AUTOEXTEND ON NEXT 640K MAXSIZE UNLIMITED
UNDO TABLESPACE "UNDOTBS1" DATAFILE '/opt/oracle/oradata/eygle/undotbs01.dbf'
SIZE 200M REUSE AUTOEXTEND ON NEXT 5120K MAXSIZE UNLIMITED
CHARACTER SET ZHS16GBK
NATIONAL CHARACTER SET AL16UTF16
LOGFILE GROUP 1 ('/opt/oracle/oradata/eygle/redo01.log') SIZE 10240K,
GROUP 2 ('/opt/oracle/oradata/eygle/redo02.log') SIZE 10240K,
GROUP 3 ('/opt/oracle/oradata/eygle/redo03.log') SIZE 10240K
USER SYS IDENTIFIED BY "&&sysPassword" USER SYSTEM IDENTIFIED BY "&&systemPassword";

以下是使用SYSAUX表空间的数据库组件:

 

 

使用SYSAUX表空间的组件				以前版本所在表空间
            Analytical Workspace Object Table	           SYSTEM
            Enterprise Manager Repository	               OEM_REPOSITORY
            LogMiner			                           SYSTEM
            Logical Standby		               	       SYSTEM
            OLAP API History Tables		               CWMLITE
            Oracle Data Mining		                   ODM
            Oracle Spatial		                       SYSTEM
            Oracle Streams		               	       SYSTEM
            Oracle Text			                       DRSYS
            Oracle Ultra Search		                   DRSYS
            Oracle interMedia ORDPLUGINS Components      SYSTEM
            Oracle interMedia ORDSYS Components          SYSTEM
            Oracle interMedia SI_INFORMTN_SCHEMA Components	SYSTEM
            Server Manageability Components	           New in Oracle Database 10g
            Statspack Repository		                   User-defined
            Unified Job Scheduler		                   New in Oracle Database 10g
            Workspace Manager	                           SYSTEM
            

 

新增的V$SYSAUX_OCCUPANTS视图可以用来查看这些信息

 

 

SQL> select OCCUPANT_NAME,OCCUPANT_DESC,SCHEMA_NAME
            2  from V$SYSAUX_OCCUPANTS;
            OCCUPANT_NAME OCCUPANT_DESC                                                    SCHEMA_NAME
            ------------- ---------------------------------------------------------------- ------------------
            LOGMNR        LogMiner                                                         SYSTEM
            LOGSTDBY      Logical Standby                                                  SYSTEM
            STREAMS       Oracle Streams                                                   SYS
            AO            Analytical Workspace Object Table                                SYS
            XSOQHIST      OLAP API History Tables                                          SYS
            SM/AWR        Server Manageability - Automatic Workload Repository             SYS
            SM/ADVISOR    Server Manageability - Advisor Framework                         SYS
            SM/OPTSTAT    Server Manageability - Optimizer Statistics History              SYS
            SM/OTHER      Server Manageability - Other Components                          SYS
            STATSPACK     Statspack Repository                                             PERFSTAT
            ODM           Oracle Data Mining                                               DMSYS
            OCCUPANT_NAME OCCUPANT_DESC                                                    SCHEMA_NAME
            ------------- ---------------------------------------------------------------- ------------------
            SDO           Oracle Spatial                                                   MDSYS
            WM            Workspace Manager                                                WMSYS
            ORDIM         Oracle interMedia ORDSYS Components                              ORDSYS
            ORDIM/PLUGINS Oracle interMedia ORDPLUGINS Components                          ORDPLUGINS
            ORDIM/SQLMM   Oracle interMedia SI_INFORMTN_SCHEMA Components                  SI_INFORMTN_SCHEMA
            EM            Enterprise Manager Repository                                    SYSMAN
            TEXT          Oracle Text                                                      CTXSYS
            ULTRASEARCH   Oracle Ultra Search                                              WKSYS
            JOB_SCHEDULER Unified Job Scheduler                                            SYS
            20 rows selected.
            

 

SYAAUX表空间具有如下限制:

 

1. 不能删除
SQL> drop tablespace SYSAUX including contents and datafiles;
drop tablespace SYSAUX including contents and datafiles
*
ERROR at line 1:
ORA-13501: Cannot drop SYSAUX tablespace

 

2. 不能重命名
SQL> alter tablespace SYSAUX rename to OPT_TBS;
alter tablespace SYSAUX rename to OPT_TBS
*
ERROR at line 1:
ORA-13502: Cannot rename SYSAUX tablespace

 

3. 不能置为read only
SQL> alter tablesapce SYSAUX read only;
alter tablesapce SYSAUX read only
*
ERROR at line 1:
ORA-00940: invalid ALTER command