1.安装oracle 10g r2的软件
2.打oracle 10g最新的补丁，我打的是升级到10.2.0.2的补丁
3.运行Pre-Upgrade Information Tool.它用来分析升级到10g前你要做的一些操作，比如需要增加或减少的参数等.
启动要升级的DB，用SYSDBA运行10g的ORACLE_HOME/rdbms/admin下的utlu102i.sql，查看产生的日志.
SQL> SPOOL info.log
SQL> @utlu102i.sql
SQL> SPOOL OFF
下面是我的info.log.

SQL> @d:\utlu102i.sql;
Oracle Database 10.2 Upgrade Information Utility    01-17-2007 13:22:37        
.                                                                              
**********************************************************************         
Database:                                                                      
**********************************************************************         
--> name:       ZHANGYE                                                        
--> version:    9.2.0.6.0                                                      
--> compatible: 9.2.0.0.0                                                      
--> blocksize:  8192                                                           
.                                                                              
**********************************************************************         
Logfiles: [make adjustments in the current environment]                        
**********************************************************************         
--> The existing log files are adequate. No changes are required.              
.                                                                              
**********************************************************************         
Tablespaces: [make adjustments in the current environment]                     
**********************************************************************         
--> SYSTEM tablespace is adequate for the upgrade.                             
.... minimum required size: 248 MB                                             
--> TEMP tablespace is adequate for the upgrade.                               
.... minimum required size: 58 MB                                              
.... AUTOEXTEND additional space required: 18 MB                               
.                                                                              
**********************************************************************         
Update Parameters: [Update Oracle Database 10.2 init.ora or spfile]            
**********************************************************************         
WARNING: --> "shared_pool_size" needs to be increased to at least 177861837    
WARNING: --> "java_pool_size" needs to be increased to at least 67108864       
WARNING: --> "streams_pool_size" is not currently defined and needs a value of 
at least 50331648                                                              
WARNING: --> "session_max_open_files" needs to be increased to at least 20     
.                                                                              
**********************************************************************         
Renamed Parameters: [Update Oracle Database 10.2 init.ora or spfile]           
**********************************************************************         
-- No renamed parameters found. No changes are required.                       
.                                                                              
**********************************************************************         
Obsolete/Deprecated Parameters: [Update Oracle Database 10.2 init.ora or spfile]
**********************************************************************         
--> "hash_join_enabled"                                                        
--> "log_archive_start"                                                        
.                                                                              
**********************************************************************         
Components: [The following database components will be upgraded or installed]  
**********************************************************************         
--> Oracle Catalog Views         [upgrade]  VALID                              
--> Oracle Packages and Types    [upgrade]  VALID                              
.                                                                              
**********************************************************************         
Miscellaneous Warnings                                                         
**********************************************************************         
WARNING: --> Deprecated CONNECT role granted to some user/roles.               
.... CONNECT role after upgrade has only CREATE SESSION privilege.             
WARNING: --> Database contains stale optimizer statistics.                     
.... Refer to the 10g Upgrade Guide for instructions to update                 
.... statistics prior to upgrading the database.                               
.... Component Schemas with stale statistics:                                  
....   SYS                                                                     
.                                                                              
**********************************************************************         
SYSAUX Tablespace:                                                             
[Create tablespace in the Oracle Database 10.2 environment]                    
**********************************************************************         
--> New "SYSAUX" tablespace                                                    
.... minimum required size for database upgrade: 500 MB                        
.                                                                              

PL/SQL 过程已成功完成。

SQL> spool off;

copy oracle 9i的pfile(D:\oracle\ora92\database\INITzhangye.ORA)到oracle 10g的pfile(D:\oracle10g\database\INITzhangye.ORA).
检查info.log，对oracle 10g的pfile修改.

--oracle 10g修改前的pfile

*.aq_tm_processes=1
*.background_dump_dest='D:\oracle\admin\zhangye\bdump'
*.compatible='9.2.0.0.0'
*.control_files='D:\oracle\oradata\zhangye\control01.ctl','D:\oracle\oradata\zhangye\control02.ctl',
'D:\oracle\oradata\zhangye\control03.ctl'
*.core_dump_dest='D:\oracle\admin\zhangye\cdump'
*.db_block_size=8192
*.db_cache_size=25165824
*.db_domain=''
*.db_file_multiblock_read_count=16
*.db_name='zhangye'
*.fast_start_mttr_target=300
*.hash_join_enabled=TRUE
*.instance_name='zhangye'
*.java_pool_size=0
*.job_queue_processes=10
*.large_pool_size=8388608
*.open_cursors=300
*.pga_aggregate_target=25165824
*.processes=150
*.query_rewrite_enabled='FALSE'
*.remote_login_passwordfile='EXCLUSIVE'
*.shared_pool_size=50331648
*.sort_area_size=524288
*.star_transformation_enabled='FALSE'
*.timed_statistics=TRUE
*.undo_management='AUTO'
*.undo_retention=10800
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='D:\oracle\admin\zhangye\udump'
*.log_archive_start=true
*.log_archive_format=%s.arc
*.log_archive_dest=D:\oracle\archive

--oracle 10g修改后的pfile

*.aq_tm_processes=1
*.background_dump_dest='D:\oracle\admin\zhangye\bdump'
*.compatible='9.2.0.0.0'
*.control_files='D:\oracle\oradata\zhangye\control01.ctl','D:\oracle\oradata\zhangye\control02.ctl',
'D:\oracle\oradata\zhangye\control03.ctl'
*.core_dump_dest='D:\oracle\admin\zhangye\cdump'
*.db_block_size=8192
*.db_cache_size=25165824
*.db_domain=''
*.db_file_multiblock_read_count=16
*.db_name='zhangye'
*.fast_start_mttr_target=300
#*.hash_join_enabled=TRUE
*.instance_name='zhangye'
*.java_pool_size=67108864
*.job_queue_processes=10
*.large_pool_size=8388608
*.open_cursors=300
*.pga_aggregate_target=25165824
*.processes=150
*.query_rewrite_enabled='FALSE'
*.remote_login_passwordfile='EXCLUSIVE'
*.shared_pool_size=177861837
*.sort_area_size=524288
*.star_transformation_enabled='FALSE'
*.timed_statistics=TRUE
*.undo_management='AUTO'
*.undo_retention=10800
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='D:\oracle\admin\zhangye\udump'
#*.log_archive_start=true
#*.log_archive_format=%s.arc
#*.log_archive_dest=D:\oracle\archive
*.streams_pool_size=50331648
*.session_max_open_files=20

4.运行Oracle Net Configuration Assistant，生成10g的listener.ora
5.rman备份DB.
6.stop所有oracle 9i的服务.
删除oracle 9i的服务.
C:\> ORADIM -DELETE -SID ZHANGYE
新建oracle 10g的服务
C:\> ORADIM -NEW -SID ZHANGYE -MAXUSERS 10 -STARTMODE AUTO -PFILE D:\oracle10g\database\INITzhangye.ORA
7.UPGRADE选项启动DB.
SQL> STARTUP UPGRADE
8.创建SYSAUX表空间
CREATE TABLESPACE sysaux DATAFILE 'D:\oracle\oradata\zhangye\sysaux01.dbf'
         SIZE 500M REUSE
         EXTENT MANAGEMENT LOCAL
         SEGMENT SPACE MANAGEMENT AUTO
         ONLINE;
9.运行10g的ORACLE_HOME/rdbms/admin/catupgrd.sql，然后运行utlu102s.sql查看升级结果.
SQL> SPOOL upgrade.log
SQL> @catupgrd.sql
SQL> @utlu102s.sql
SQL> SPOOL OFF
检查upgrade.log，如果有错误，处理错误后再次运行catupgrd.sql.
10.重新启动DB，编译无效对象.
SQL> shutdown immediate
SQL> startup pfile=D:\oracle10g\database\INITzhangye.ORA
SQL> @D:\oracle10g\RDBMS\ADMIN\utlrp.sql
编译后没有无效对象
SQL> SELECT count(*) FROM dba_objects WHERE status='INVALID';

  COUNT(*)
----------
         0
升级完成.        
详细请参考Oracle? Database Upgrade Guide 10g Release 2 (10.2) Part Number B14238-01