ALL POSTS

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.

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.

Failovers with Oracle Dataguard

In the last month, we have been hit with two clients’ large-scale failures. The first involved network issues; the second, disk failures. What happened?. We took one of the standbys and turned it into a primary. The other standby then automatically started recovering from the new primary! That was it. What a let down! No magical status updates, no little “dots” going across the screen. Just one line and 15 seconds. Oracle, get your act together! I even had to use bold text to make it stand out.

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.

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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