Upgrading the Oracle Server

Hello,
I have a general question regarding an upgrade time frame:
SAP is the ERP software being used and the Data Base in place is Oracle 9i. Right now the production DB server(where oracle resides) has got 4GB of RAM and we want to upgrade it to 8GB of RAM. My question is how much time would this take in terms of the downtime? One Day? Two Days or what's your opinion?
More over what precautions should be taken in to account when doing such an upgrade??
Thank you all.

Hello,
I have a general question regarding an upgrade time
frame:
SAP is the ERP software being used and the Data Base
in place is Oracle 9i. Right now the production DB
server(where oracle resides) has got 4GB of RAM and
we want to upgrade it to 8GB of RAM. My question is
how much time would this take in terms of the
downtime? One Day? Two Days or what's your opinion?if the sysdamin is your colleague of job, 1H
if you have need of the support of the supplier,
1-2 day :)
especially if the supplier, is ... :(
pasquale rago

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Edited by: user10968783 on Jun 1, 2011 3:39 AM

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The following link was following for the upgrade.
http://docs.oracle.com/cd/E23943_01/upgrade.1111/e10129/upgrade_oim.htm
Any help will be much appreciated.

Hi,
I found the solution to my problem in the following link:
http://blog.darwin-it.nl/2012/05/im-helping-my-new-customer-in-migrating.html
Regards,
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cu
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