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Compatible parameter set too specifically will it affect my database?

Posted on Nov 26, 2011 at 08:51 PM 13 Views

Hello,

I performed an upgrade from 9 to 10.2, when setting the compatible parameter I set that to 10.2.0.5 instead of 10.2.0.

I know that according to note 830576 and the guide, that parameter should be 10.2.0 but since I can't change it, I want to know if there would be any problems with the database or the SAP system

Thanks in advance

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    author's profile photo Stefan Koehler
    Stefan Koehler
    Posted on Nov 26, 2011 at 09:43 PM
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    Hello Maria,

    at first you should understand what happens when you set this parameter. Please check the official documentation for a detailed explanation: http://docs.oracle.com/cd/E11882_01/server.112/e25494/create005.htm#ADMIN11112

    I want to know if there would be any problems with the database or the SAP system

    Running your Oracle database with a 4 digit compatible parameter is not a "problem", but maybe you are not able to perform a rollback of the 10.2.0.5 patchset without a restore anymore. That's the reason why SAP (and other vendors) recommend to set only 2-3 digits of the oracle version.

    Only Oracle knows, If the current patchset 10.2.0.5 (already) changed some stuff that is incompatible with an older 10g R2 patchset.

    - A new feature stores any data on disk (including data dictionary changes) that cannot be processed with your previous release.

    - An existing feature behaves differently in the new environment as compared to the old environment. This type of incompatibility is classified as a language incompatibility.

    You can try to lower it and restart your DB - if your database is already incompatible you will get an ORA error.

    Regards

    Stefan

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