Posts by Alex Gorbachev
UKOUG 2006- I have three sessions there. These are first three right on Tuesday after the Opening Technical Keynote by Tom Kyte.
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.
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.
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:
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.
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.
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.
In this post I compare Oracle Enterprise to Standard Editionand and proviode a features matrix outlining the diffrences between them.
Indeed, while the technique we discuss here is basic, it gives a good overview and is very easy to use. So let get focused… We will use iostat utility. There is much to say about IO monitoring and interpreting results. Perhaps this is only the first of a series of posts about IO statistics. At Pythian we often come across different environments with specific characteristics and various requirements that our clients have. So stay tune — more to come.