Tag: DBA Lounge

On the Way to UKOUG 2006 – Delayed but Still Coming

UKOUG 2006- I have three sessions there. These are first three right on Tuesday after the Opening Technical Keynote by Tom Kyte.

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Speeding-Up Oracle Export/Import Migration

Over the last weekend I had the pleasure to do an 8i -> 10g, Solaris -> Linux migration. Talk about going in head–first. Now, whenever I run into a situation like this, we generally recommend a two–step process so that we can iron out bugs and be able to isolate causes. However, we were under serious time constraints, and we decided to just go with the following simple plan and move straight there.

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Level 1 Incremental Backup in Oracle 10g

While reviewing some material in advance of my presentation at UKOUG Conference 2006, I found an interesting change in RMAN behavior in Oracle 10g. The difference is in the way RMAN handles the case when an incremental level 1 backup is taken without an available level 0 backup. This probably won’t affect anyone much, but I found it interesting. And actually, there are scenarios in which it might cause issues.

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Security Compliance is Not Enough

I have been working on issues that relate to security certification at a number of our clients, and I can’t say that I have anything good to say about it.. Compliance standards are set such that you are protecting against the bulk of the people out there. This is generally very good practice, but when you rely on standardization alone, you open yourself to real danger.

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Announcement: DBD::Oracle 1.19 Released

The latest release of DBD::Oracle is now ready and can be found at CPAN DBD::Oracle

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Oracle 10.2 Migrations Account LOCKED and FAILED_LOGIN_ATTEMPTS

Recently we’ve had quite a few migrations to 10g Release 2 and several times been hit by one issue some users consistently get locked with status LOCKED(TIMED). One good example is with the DBSNMP and SYSMAN users, but more important are locked production accounts.

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Oracle RAC Cache Fusion Efficiency: A Buffer Cache Analysis

Many people would like to know how well their application will run in RAC. Would it be faster or slower? Would it run at all? Well, I have a query that can answer that question. There’s a caveat however. You have to first put your application in RAC, then the query can tell you how well it runs.

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Using the Oracle Wait Interface to Troubleshoot I/O Issues

One of our more stable clients had some serious “mystery” production problems. To paraphrase, their app that was running “OK” starting running “sucky”. I knew that nothing had changed from our end and so being the intrepid super-sleuths that we are, we determined that the problems were related to I/O.

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Oracle Data Pump Can’t Import LONG Columns

If you are using Oracle Data Pump to backup tables containing LONG or LONG RAW columns, then you might be surprised when trying a recovery. Well, you tested it already. Didn’t you? ;-) Right now I’m in the middle of a production migration. Earlier this week while testing this migration, I noticed couple strange errors during Data Pump import:

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Oracle Data Pump Schema Export and Public Synonyms

While testing a migration, I figured out that schema export using Data Pump doesn’t capture public synonyms on the objects in this schema. Does anyone know how to make Data Pump include public synonyms with schema export? Update: This is actually the same behavior as old Export utility.

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