Posts by Alex Gorbachev

UKOUG 2006 Day 2+

Interesting was the Anti-Tuning RAC round-table with conclusion that more or less majority is running RAC because they have way too much money/time/hardware/name it.

Backwards 1 Day 2006 UKOUG

I can’t say a lot about presentations I went to as my head was completely empty after my 3 sessions. Last session was on Oracle Streams CDC – I am still not sure what the added value of CDC compare to regular Streams functionality. But the truth is I couldn’t think about anything else but Guinness at that point…

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.

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:

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.

Oracle popularity – 8i vs. 9i vs. 10g

A few days ago Kevin Closson (keep an eye on this new blog and expect to find something interesting there) mentioned that Oracle 8.1.7 is one of the most mature releases (at least I understood it this way). I agree with him that many people still use it, but how many? Visit Google Trend and enter “oracle 8i, oracle 9i, oracle 10g” and take in the popularity trends.

Oracle LogMiner Helps Investigate Security Issues

This will help when you need to investigate some past changes to your database when auditing was not enabled. This doesn’t imply that you don’t need auditing. On the contrary, I see no reason not to use it in any and every database. However, often we get systems “as is” and we need a working method now and not the next time it happens.

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