Oracle10g新特性-SYSAUX表空间
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。
假如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:
代码:
--------------------------------------------------------------------------------
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 ComponentsSYSTEM
Oracle interMedia ORDSYS ComponentsSYSTEM
Oracle interMedia SI_INFORMTN_SCHEMA ComponentsSYSTEM
Server Manageability ComponentsNew in Oracle Database 10g
Statspack RepositoryUser-defined
Unified Job SchedulerNew in Oracle Database 10g
Workspace Manager&n
新增的V$SYSAUX_OCCUPANTS视图可以用来查看这些信息。
代码:
SQL select OCCUPANT_NAME,OCCUPANT_DESC,SCHEMA_NAME
2from V$SYSAUX_OCCUPANTS;
OCCUPANT_NAME OCCUPANT_DESCSCHEMA_NAME
------------- ---------------------------------------------------------------- ------------------
LOGMNRLogMiner SYSTEM
LOGSTDBYLogical StandbySYSTEM
STREAMS Oracle Streams SYS
AOAnalytical Workspace Object TableSYS
XSOQHISTOLAP API History TablesSYS
SM/AWRServer Manageability - Automatic Workload Repository SYS
SM/ADVISORServer Manageability - Advisor Framework SYS
SM/OPTSTATServer Manageability - Optimizer Statistics HistorySYS
SM/OTHERServer Manageability - Other ComponentsSYS
STATSPACK Statspack Repository PERFSTAT
ODM Oracle Data Mining DMSYS
OCCUPANT_NAME OCCUPANT_DESCSCHEMA_NAME
------------- ---------------------------------------------------------------- ------------------
SDO Oracle Spatial MDSYS
WMWorkspace ManagerWMSYS
ORDIM Oracle interMedia ORDSYS ComponentsORDSYS
ORDIM/PLUGINS Oracle interMedia ORDPLUGINS ComponentsORDPLUGINS
ORDIM/SQLMM Oracle interMedia SI_INFORMTN_SCHEMA ComponentsSI_INFORMTN_SCHEMA
EMEnterprise Manager RepositorySYSMAN
TEXTOracle TextCTXSYS
ULTRASEARCH Oracle Ultra SearchWKSYS
JOB_SCHEDULER Unified Job SchedulerSYS
20 rows selected.
SYAAUX表空间具有如下限制:
代码:
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: inval
假如希望转移这些系统对象的表空间，可以使用相应得系统包实现:
代码:
SQL set linesize 120
SQL col schema_name for a18
SQL col occupant_name for a13
SQL col move_procedure for a32
SQL SELECToccupant_name, schema_name, move_procedure,space_usage_kbytes
2FROMv$sysaux_occupants
3ORDER BY1
4/
OCCUPANT_NAME SCHEMA_NAMEMOVE_PROCEDURE SPACE_USAGE_KBYTES
------------- ------------------ -------------------------------- ------------------
AOSYSDBMS_AW.MOVE_AWMETA 768
EMSYSMAN emd_maintenance.move_em_tblspc0
JOB_SCHEDULER SYS256
LOGMNRSYSTEM SYS.DBMS_LOGMNR_D.SET_TABLESPACE 7488------------注重这里
LOGSTDBYSYSTEM SYS.DBMS_LOGSTDBY.SET_TABLESPACE0
ODM DMSYSMOVE_ODM0
ORDIM ORDSYS 0
ORDIM/PLUGINS ORDPLUGINS 0
ORDIM/SQLMM SI_INFORMTN_SCHEMA 0
SDO MDSYSMDSYS.MOVE_SDO0
SM/ADVISORSYS 5760
OCCUPANT_NAME SCHEMA_NAMEMOVE_PROCEDURE SPACE_USAGE_KBYTES
------------- ------------------ -------------------------------- ------------------
SM/AWRSYS
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