I have to give credit to Julian Dyke (BMC) who had this - and many other gems - in his presentation at the Hotsos performance symposium in Dallas in February. Because of personal reasons he unfortunately could not make it to IOUG for his presentation on indexes, but I got to download his presentation during the pre-access period. Excellent stuff as well.

I hope I'll meet you someday in person. I always find it endearing when someone not only goes out of their way to prove themselves wrong but then goes and publishes it to the world. You're an ace.

At 07:50 PM 5/28/2003 -0800, you wrote:

On 2003.05.28 23:04 Wolfgang Breitling wrote:
> I was about to post the results of my test which also did prove you wrong.
> I ran the test with a 10046 level 8 trace to show the individual index
> block reads which nicely show why it is called a skip scan, but since you
> already proved yourself wrong there is no need.

Thanks, Wolfgang! If there is one thing I really excel at, that is proving
myself wrong. I succeeded again.


> > BTW, as of Oracle 9 you don't necessarily need to restart the database to > reset the pools. This should do the trick: > > ALTER SESSION SET EVENTS 'immediate trace name flush_cache'; > alter system flush shared_pool;


Thanks! How did you come accross this little gem?


Wolfgang Breitling
Centrex Consulting Corporation
http://www.centrexcc.com

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