A database move from 32-bits to 64-bits

Today, a move of a database from OEL5.3 32-bits to OEL5.3 64-bits. The database is running on Oracle 11.1.0.7 32-bits on source.

Firstly, be sure your target OS is a 64-bits OS :
[oracle@orion2:/apps/oracle/product/11.1.0/bin]$ uname -m
x86_64

And also an Oracle software 64-bits :
[oracle@orion2:/apps/oracle/product/11.1.0/bin]$ file oracle
oracle: setuid setgid ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not stripped

Shut the source database down, and copy to the new pletform all the files (including spfile or pfile).
Then on the 64-bits OS, start the database in upgrade mode and run utlirp.sql script, that'll invalidate all the objects :
[oracle@orion2:/apps/oracle/admin/DMOCRM9/pfile]$ export ORACLE_SID=DMOCRM9
[oracle@orion2:/apps/oracle/admin/DMOCRM9/pfile]$ sqlplus / as sysdba

SQL*Plus: Release 11.1.0.7.0 - Production on Sun Mar 15 11:16:14 2009

Copyright (c) 1982, 2008, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup upgrade pfile='/apps/oracle/admin/DMOCRM9/pfile/initDMOCRM9.ora'
ORACLE instance started.

Total System Global Area 764121088 bytes
Fixed Size 2163600 bytes
Variable Size 197135472 bytes
Database Buffers 557842432 bytes
Redo Buffers 6979584 bytes
Database mounted.
Database opened.
SQL> @$ORACLE_HOME/rdbms/admin/utlirp.sql
[...]

Finally, restart your database in normal mode, and run utlrp.sql script to recompile all the invalidated objects :
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup pfile='/apps/oracle/admin/DMOCRM9/pfile/initDMOCRM9.ora'
ORACLE instance started.

Total System Global Area 764121088 bytes
Fixed Size 2163600 bytes
Variable Size 197135472 bytes
Database Buffers 557842432 bytes
Redo Buffers 6979584 bytes
Database mounted.
Database opened.
SQL> @$ORACLE_HOME/rdbms/admin/utlrp.sql
SQL> Rem
[...]

Check the status of the objects onto the database :
SQL> select * from dba_registry
SQL> /

CATALOG
Oracle Database Catalog Views
11.1.0.7.0 VALID 15-MAR-2009 11:47:55
SERVER SYS
SYS
DBMS_REGISTRY_SYS.VALIDATE_CATALOG



CATPROC
Oracle Database Packages and Types
11.1.0.7.0 VALID 15-MAR-2009 11:47:55
SERVER SYS

SYS
DBMS_REGISTRY_SYS.VALIDATE_CATPROC

DBSNMP,OUTLN,SYSTEM,TSMSYS


SQL>
SQL> select count(*) from dba_objects where status != 'VALID';

COUNT(*)
----------
0

Lastly, you can be happy with your 64-bits database :
[oracle@orion2:/apps/oracle/admin/DMOCRM9/pfile]$ sqlplus / as sysdba

SQL*Plus: Release 11.1.0.7.0 - Production on Sun Mar 15 12:01:13 2009

Copyright (c) 1982, 2008, Oracle. All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL>
SQL> select * from v$version;

Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
PL/SQL Release 11.1.0.7.0 - Production
CORE 11.1.0.7.0 Production
TNS for Linux: Version 11.1.0.7.0 - Production
NLSRTL Version 11.1.0.7.0 - Production

SQL> desc v$session
Name Null? Type
----------------------------------------- -------- ----------------------------
SADDR RAW(8)
[...]