Tag: Oracle

EBS DBAs Be Warned! NOLOGGING Can Hit You Badly …

I’ve just come across an old known issue again today. Was working in the greatest and latest 12.1.2 Oracle e-Business Suite environment. Surprisingly, I face the old issue when WF_LOCAL_ROLES and WF_LOCAL_USER_ROLES objects (among other objects) are set to NOLOGGING mode. The easiest solution is to switch the whole database to FORCE_LOGGING mode:

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Oracle Setting High Naming Standards

As part of my preparation for the Exadata OCP Exam, I was reading through the “Oracle® Exadata Storage Server Software User’s Guide”. I found the two famous events in the Exadata world, “db file scattered read” and “db file sequential read” that cause so much confusion, have been renamed to “cell multiblock physical read” and “cell single block physical read” accordingly. Hopefully Oracle will port those events’ names to the RDBMS world as well in version 12c.

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Exadata Customer Case Study at Oracle OpenWorld

As I work on putting together slides, I’d like to remind you all of my Oracle OpenWorld 2010 presentation, a customer case study migrating a complex data warehouse environment to Exadata. I’ll be presenting along with Michael Aldrich of LinkShare and Aiman al-Khammash of Oracle, and focusing on our own experience with Exadata, lessons learned, and advice for others choosing to implement Exadata.

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Ensuring Table With 1 Row in Oracle 11g Using Virtual Column

There was a discussion on the OTN General database forum, in which the OP asked creating a table with just one row and restricting that table to just one row. Here is my attempt at it.

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Oracle-Related Events in Sydney Area (September 2010)

If it happens and you are in and around the Sydney area 1-2 weeks from now then you might be interested in taking part in these events.

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How to GNS process log level for diagnostic purposes?

I was troubleshooting a new GNS (Grid Name Services) functionality and noticed a-trace-level parameter in the GNS process string. Unfortunately there is no description in the documentation or MOS on how to change it to generate invaluable diagnostic information. NOTE: I am sure the documentation will be updated in Database 12c version (c for Cloud. For the time being the following should work for you.

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Bloggers Meetup @ Oracle OpenWorld 2010

It’s that time of the year again — Oracle OpenWorld time — and it’s my pleasure to announce our regular Oracle bloggers meetup again this year. We all know that Oracle community has grown this year so we expect to see folks from all the different technologies including MySQL, Java, Sun hardware folks in addition to the core Oracle database and apps crowd.

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Oracle Exadata HCC Removes the 255 Columns Limit

As a follow up from my previous post on Exadata Design, where I question the use of dimensions for certain attributes in data warehouses, I figured I should test whether HCC works with tables that have more than 255 columns, It does. Here’s my test case.

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Michigan OakTable Symposium (MOTS)

Michigan OakTable Symposium (MOTS) is a unique event taking place just before Oracle OpenWorld — 16-17 September. Why unique? This is the first conference (is it not?) where all presenters are members of OakTable Network, a group that gathers number of like-minded IT professionals with scientific approach to Oracle database technology and to the life in general.

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Exadata storage server software 11.2.1.3.1 released

As of this afternoon, version 11.2.1.3.1 of Oracle’s Exadata storage server software, is out in the wild. This is the first publicly available version of the 11.2.1.3 branch, a major release including a full OS image with an update to Oracle Enterprise Linux 5.5. A number of bugs causing cell server crashes and hangs have been fixed, including 9472035, 9870117, and 9722560.

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