Oracle 10 upgrade - Primary & standby database

Hi Expert,
I need some information on your project experience. We're currently planning a oracle 10 upgrade. Have a few question:
1. We're planning to upgrade the primary database first and a week later the standby database. Will the archive log which is sent from primary to standby database will still work? Will the recovery still work?
2. Is this the right patch to go 10.2.0.4? I'm currently on 4.7 ext 2
3. Will there be a performance issue known of oracle 10 running on 32-bit machine, since it has the limitation of the memory (3G). Do I need to set AWE option on windows?
Thanks in advance.

Hello Sean,
please let me go more in detail with some of your comments.
> I actually posted my experience with doing a rolling upgrade of a PHYSICAL standby database.
This statement is wrong. You can't do a rolling upgrade with a physical standby database. You have to convert the database to a logical standby database .. and then you can perform a rolling upgrade. But if you have done the conversion, it is not a physical anymore.
This is also described and mentioned in this white paper:
http://www.oracle.com/technology/deploy/availability/pdf/maa_wp_10gr2_rollingupgradebestpractices.pdf
Data Guard SQL Apply (logical standby database) is required in order to perform a database rolling upgrade. You can also do a rolling upgrade when starting with a physical standby by temporarily converting the physical standby to a logical standby. If starting with 11g, see the Rolling Database Upgrades for Physical Standby Databases using Transient Logical Standby 11g paper for details on doing a rolling upgrade when starting with a physical standby. If starting with 10g, see MetaLink note 300479.1.
> It WILL work, and is fairly straight forward.
In this point you are almost correct, because of a standard SAP system is not using the unsupported data types, etc. (afaik)
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/data_support.htm
To be honest if a sap basis admin asks such a question, i would not recommend to perform an unsupported way, because i am in doubt about his dataguard know how.
Regards
Stefan

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