DBUA

Restarting a failed Database Upgrade with DBUA 12.2

In my previous blog post I did showcase how to restart a failed database upgrade on the command line before Oracle Database 12c, with Oracle Database 12.1.0.x and with the new Oracle Database 12.2.0.x:

Here I’d like to show the new capability of the Database Upgrade Assistant (DBUA) to restart an upgrade, a functionality the DBUA was missing until now. Please note that you can always go back to the command line, no matter in which version you have used the DBUA.

I won’t describe an upgrade with the DBUA in this … [ Read more ]

DBUA and Read-Only Tablespaces – Things to Know II

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Thanks to Rodolfo Baselli commenting on a previous blog post about the DBUA and Read-Only Tablespaces I dug a bit deeper and found out that “assuming silently” does not mean “works as intended“.

But one piece after another.

Rodolfo commented that if he [ Read more ]

DBUA and Read-Only Tablespaces – Things to Know – I

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Some people prefer the manual upgrade on the command line, others prefer the graphical tool Database Upgrade Assistant (DBUA).

DBUA and Read-Only Tablespaces 

The DBUA offers you an option of setting your non-Oracle tablespaces read-only during the upgrade.

DBUA Read Only 1

What the option doesn’t tell you … [ Read more ]

DBUA displays wrong RMAN backup for restore – Oracle 12.1.0.2

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If you are using the Database Upgrade Assistant (DBUA) to upgrade your database to Oracle Database 12.1.0.2 be aware when you choose to potentially restore your database from a existing backup in case of an error during the upgrade.

First of all I would always stop DBUA … [ Read more ]

DBUA 12c and “datapatch.pl” – things to know

For clarification:
The following blog post applies to upgrades to Oracle 12.1 done by DBUA only whenever a SPU/PSU/BP is installed into the 12.1 home prior to the upgrade (which I’d highly recommend as patching before upgrade saves you headache after upgrade!).

Update [Dec 10, 2015]:
The required patch is included in  12.1.0.2BP13 but not 12.1.0.2.PSU5 (Oct 2015) – it will be included in the 12.1.0.2.PSU6 (Jan 2016) and all following PSUs.

Update:
For Oracle Database 12.2 and newer please see:
https://mikedietrichde.com/2017/05/25/dbca-execute-datapatch-oracle-database-12-2/


Two customers independently reported last week that they have doubts on DBUA’s ability to apply the required SQL [ Read more ]

DBUA can ignore underscores with “keepHiddenParams”

The Database Upgrade Assistant (DBUA) is the graphical tool to upgrade Oracle databases. And the DBUA removes underscore parameters by default from the SPFILE when upgrading a database. If you don’t want this, there’s a way to tell it how DBUA can ignore underscores with “keepHiddenParams”.

DBUA can ignore underscores with “keepHiddenParams”

The DBUA by default will remove all underscores and events before actually doing an upgrade. This is expected behaviour as we believe that underscores or events were meant to treat misbehavior of the database just in a specific release only. And in our experience a nice collection … [ Read more ]

New Slides – and a discussion about Dictionary Statistics

First of all we have just upoaded a new version of the Upgrade and Migration Workshop slides with some added information. So please feel free to download them from here.The slides have one new interesting information which lead to a discussion I’ve had in the past days with a very large customer regarding their upgrades – and internally on the mailing list targeting an EBS database upgrade from Oracle 10.2 to Oracle 11.2.

Why are we creating dictionary statistics during upgrade?

I’d believe this forced dictionary statistics creation got introduced with the desupport of the Rule Based Optimizer in … [ Read more ]