Migrating Oracle E-Business Suite R12 from Linux 32-bit to Linux 64-bit

A handy new Note documents the process of migrating an Oracle E-Business Suite Release 12 environment from a Linux 32-bit operating system to a Linux 64-bit operating system.  The migration process incorporates portions of existing processes and references steps in existing documentation. For details, see:


Hi Steven,

We are currently planning a 11.5.9CU2 / 9iR2 upgrade to Release 12.

Current 11.5.9CU2 is running on 32-bit RHEL4 Linux (current server A)
Our target is to have R12/10gR2 or 11g on 64-bit Linux on a new server (target server B).

We have absolutely no room/capacity on current server A to upgrade in place, then migrate to the new 64-bit Linux server B.

We know that 11i is not supported on 64-bit linux OS and that R12 is supported on either 32-bit or 64-bit linus OS.

Question: is it possible technically to:
(a) Install 64-bit linux os on server B
(b) Clone current 11.5.9CU2 environment from server A to server B
(c) Upgrade to R12 on server B.
--> have a R12 running on Linux 64-bit

... or we absolutely need intermediate steps like upgrading to R12 on a 32-bit linux then migrate from R12 32-bit to R12 64-bit?



Posted by Simon Benoit on January 28, 2009 at 01:16 AM PST #

Hi, Simon,

Having not tried this particular approach myself, I can't give you a recommendation with any degree of authority. I'll ask one of our experts from our Applications Platforms Group to comment on this.


Posted by Steven Chan on January 29, 2009 at 02:45 AM PST #

Perhaps an off topic... How well is R12 supported on RHEL64? I know it's certified for RHEL64, but it is also certified on Itanium/Windows in split configuration. And I know from personal experience that split configuration, especially with DB on Itanium is bad. We plan to move to Linux but we have doubts about RHEL64.

Perhaps RHEL32 is a better, more stable choice?

Thank you!

Posted by Kirill on April 07, 2009 at 01:04 PM PDT #

Actually, you'll be pleased to hear that the applications code itself delivered on 32-bit Linux and on 64-bit Linux is identical, so there is no quality or support difference; in fact, rigorous technology and functional integration testing is done on both OS flavors. And, you can run the database on 64-bit Linux, thereby gaining scalability. We do not consider Linux x64 a "split config" -- it is a primary Release 12 platform. Unfortunately, we do not offer the same support for Itanium.


Posted by Terri Noyes on April 09, 2009 at 08:36 AM PDT #

Hi Steven,


Oracle Applications Tier supported on 32 bit emulation
running on a 64 bit Linux OS?

Mohammed Ali

Posted by Mohammed Ali on June 30, 2009 at 07:13 AM PDT #

Hi, Mohammed,

Your Oracle account team has also contacted us directly on this. Rekha Balwada will be following up with you with an answer from our Applications Platforms Group on this.


Posted by Steven Chan on July 01, 2009 at 03:34 AM PDT #

I want to migrate E-Business Suite R12.0.4 from RHEL 32 bit to 64bit using Oracle cloning method. I am planning to perform this tasks as below

1. Export OLAP analytical workspace

2. Create control file

3. Take a cold backup of source (RHEL 32bit) E-Business Suite Application and Database.

4.. Install 64 bit RHEL O/S with all required packages for E-Business Suite R12 on new server.

5. Install 64 bit E-Business S/W with latest Raid Clone patches

6. Perpare the source system database and application tier for cloning (autoconfig, maintain snapshot etc).

7. Prepare the target system :

A) Copy the database (.dbf) files from the source machine to the target machine
B) Copy the database configuration files init.ora and ifilecbo.ora

C) Modify configuration files on target machine to reflect the new environment. Also, set _system_trig_enabled=false
D) Start up the database in nomount mode

E) Recreate the database control files

F) Upgrade the database from 32-bit to 64-bit (recompile pl/sql modules and change the word size) by running utlirp.sql and utlrp.sql (in ORACLE_HOME/rdbms/admin/).
Remove _system_trig_enabled=false from init.ora
Shutdown and restart the database normally

G) Import analytical workspace

H) Re-create Custom database link

8) Configure the target system (run adcfgclone.pl on apps and db tier)

9) Perform finishing tasks (profile,printer, workflow etc).

Do let me know if I need to do any addatinal tasks then above listed down?


Posted by Virendra Chavan on October 05, 2010 at 06:32 PM PDT #

Hi, Virendra,

Unfortunately, I'm not in a position to compare your steps against Note 471566.1. My general guidance would be to follow that Note rather than improvising your own custom procedures. If you have any questions about that Note, please feel free to log a formal Service Request via Oracle Support to get assistance.

Good luck with your migration.


Posted by Steven Chan on October 06, 2010 at 01:26 AM PDT #

Hello Steven,

would like to migrate their R12.1.3 environment RHEL 64 bit to OEL 32 bit.
How this can be achieved ?

We have a note on 32-bit to 64-bit Migration 471566.1 Migrating Oracle E-Business Suite R12 from Linux 32-bit to Linux 64-bit
but not vice versa


Posted by Famy on November 15, 2011 at 07:40 PM PST #


I am looking for information on Migrating R12.1.3 mid-tier from windows 32bit to Linux x86-x64.


Posted by guest on December 20, 2012 at 03:03 PM PST #

Differently than Linux Platforms, Oracle E-Business Suite 12.1.1 is only available for 32 Bits.

Posted by Max Arderius on December 24, 2012 at 07:47 AM PST #

Hi Steven,

Can you please let us know if RHEL 5 32 bit on the Application Server supports Oracle E-Businbess Suite R12.13?I saw the certification in Metalink and saw it does.Just wanted to know if that is still valid?

Posted by guest on June 10, 2014 at 11:54 PM PDT #

hi guest -
Yes, the information in My Oracle Support Certifications regarding RHEL 5 and EBS 12.1.3 is correct.

Posted by John Abraham on June 16, 2014 at 06:33 PM PDT #

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