oracle 索引迁移，释放磁盘空间

索引文件迁移步骤：

准备工作：
1)备份GBOS用户表索引：通过plsqlDevelop工具将GBOS用户表索引全部导出，以做备份。

1.查看索引表空间 具有那些数据文件
select file_id,file_name,tablespace_name,bytes/1024/1024 M,blocks from dba_data_files
where  TABLESPACE_NAME='USERINDEX'order by 1;

  FILE_ID FILE_NAME                                          TABLESPACE          M     BLOCKS
--------- -------------------------------------------------- ---------- ---------- ----------
       19 D:\ORACLE\ORADATA\INNETDB\USERINDEX01.DBF          USERINDEX       10240    1310720
       20 D:\ORACLE\ORADATA\INNETDB\USERINDEX02.DBF          USERINDEX       10240    1310720
       21 D:\ORACLE\ORADATA\INNETDB\USERINDEX03.DBF          USERINDEX       10240    1310720
       22 D:\ORACLE\ORADATA\INNETDB\USERINDEX04.DBF          USERINDEX       10240    1310720
       23 D:\ORACLE\ORADATA\INNETDB\USERINDEX05.DBF          USERINDEX       10240    1310720
       39 D:\ORACLE\ORADATA\INNETDB\USERINDEX06.DBF          USERINDEX        6500     832000
       40 D:\ORACLE\ORADATA\INNETDB\USERINDEX07.DBF          USERINDEX        6500     832000
       41 D:\ORACLE\ORADATA\INNETDB\USERINDEX08.DBF          USERINDEX        6500     832000
       42 D:\ORACLE\ORADATA\INNETDB\USERINDEX09.DBF          USERINDEX        6300     806400
       43 D:\ORACLE\ORADATA\INNETDB\USERINDEX10.DBF          USERINDEX        6300     806400
       62 D:\ORACLE\ORADATA\INNETDB\USERINDEX11.DBF          USERINDEX        1400     179200
       63 D:\ORACLE\ORADATA\INNETDB\USERINDEX12.DBF          USERINDEX        1400     179200

2.创建新的索引表空间，添加索引数据文件
CREATE SMALLFILE TABLESPACE "INDEXTBS" DATAFILE 'D:\ORACLE\ORADATA\INNETDB\INDEXTBS\INDEX001.DBF'
SIZE 100M AUTOEXTEND ON NEXT 100M MAXSIZE 2000M LOGGING EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO;

ALTER TABLESPACE "INDEXTBS" ADD DATAFILE 'D:\ORACLE\ORADATA\INNETDB\INDEXTBS\INDEX003.DBF'
SIZE 100M AUTOEXTEND ON NEXT 100M MAXSIZE 4000M ;

3.查找属于gbos用户的表索引，(除去clob类型的索引,clob索引存放在user表空间）
(分区索引存放在dba_segments表里，普通索引信息放在dba_indexes表里)
SELECT 'alter index  gbos.'||index_name||'  rebuild tablespace INDEXTBS'
FROM dba_INDEXES T where t.table_owner='GBOS'
and index_name not like '%SYS_%'
and t.tablespace_name='USERINDEX'

SELECT 'alter index  gbos.'||index_name||'  rebuild tablespace INDEXTBS'
FROM dba_INDEXES T where t.tablespace_name='USERINDEX' and t.table_owner='GBOS'

普通索引迁移
alter index  gbos.INDEX_T_B_FAULT_LIST_STATUS  rebuild tablespace INDEXTBS;
alter index  gbos.INDEX_T_B_FAULT_L_OCCUR_TIME  rebuild tablespace INDEXTBS;
alter index  gbos.INDEX_T_B_FAULT_L_TERMINALID  rebuild tablespace INDEXTBS;
alter index  gbos.IDX_CAR_INFO_COL  rebuild tablespace INDEXTBS;
alter index  gbos.IX_T_O_OPEN_DOOR_REC_CLCT_DATE  rebuild tablespace INDEXTBS;
alter index  gbos.IX_T_O_OPEN_DOOR_REC_TERM_ID  rebuild tablespace INDEXTBS;
alter index  gbos.IX_T_O_OPEN_DOOR_REC_TICK  rebuild tablespace INDEXTBS;

分区索引迁移
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P61 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P62 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P63 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P64 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P65 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P66 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P67 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P68 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P69 tablespace INDEXTBS;
 Alter index gbos.IDX_O_PERIOD_INFO_COLS rebuild partition SYS_P70 tablespace INDEXTBS;

Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P41 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P42 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P43 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P44 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P45 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P46 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P47 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P48 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P49 tablespace INDEXTBS;
Alter index gbos.INDEX_T_O_PERIOD_INFO rebuild partition SYS_P50 tablespace INDEXTBS;

Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P51 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P52 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P53 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P54 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P55 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P56 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P57 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P58 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P59 tablespace INDEXTBS;
Alter index gbos.Ix_T_O_Period_Info_Tick rebuild partition SYS_P60 tablespace INDEXTBS;

4.执行以上语句将索引从USERINDEX空间迁移到INDEXTBS空间。

5.将索引空间数据文件脱机(非归档模式下 需要drop)
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX01.DBF'    offline;    
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX02.DBF'    offline;   
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX03.DBF'    offline;     
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX04.DBF'    offline;    
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX05.DBF'    offline;    
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX06.DBF'    offline;    
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX07.DBF'    offline;     
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX08.DBF'    offline;  
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX09.DBF'    offline;   
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX10.DBF'    offline;  
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX11.DBF'    offline;  
alter database datafile 'D:\ORACLE\ORADATA\INNETDB\USERINDEX12.DBF'    offline;  

6.删除USERINDEX表空间及相关联文件，再观察磁盘是否是否空间
drop tablespace USERINDEX
including contents and datafiles cascade constraints;

7.编译oracle相关服务是否有存储错误，用gbos账号登陆 是否能正常查询表，
启动相关服务。

注意：分别查看表索引对应的数据文件
select TABLE_NAME,SEGMENT_NAME,TABLESPACE_NAME,INDEX_NAME from dba_lobs where OWNER='GBOS';
select header_file,segment_name,tablespace_name,header_block from dba_segments
where segment_name='SYS_C0036848';
 
select INDEX_NAME,TABLE_NAME from  dba_indexes where owner='GBOS' ;
select header_file,segment_name,tablespace_name,header_block from dba_segments
where segment_name='T_O_MENUSET_PK';

转载于:https://blog.51cto.com/supremejoywei/1132150