You'll have to forgive my obtuseness. I only ever log into my Oracle servers as "oracle" and am able to login locally with$ sqlplus / as sysdbaor$ sqlplus dtsSo today I was a little scared when I couldn't do this from an OS user other than oracle. The $ORACLE_SID variable... [Read More]
The Story of RMAN Duplication and the Pre-Existing Tempfiles
Just a brief note to share with you that if you are performing an RMAN duplication over an existing instance, you'll want to delete your temporary tablespace tempfiles first. Metalink Note 374934.1 can tell you the whys and wherefores. The note also seems to suggest that the problem exists solely... [Read More]
In his paper "Using DBMS_STATS in Access Path Optimization", Wolfgang Breitling writes:Histograms are like drugs -- An overdose [of histograms] can kill [performance].I've gotten a crash course on this recently. More on that in a bit.
I'm Kind of a Big Deal Around Here
Yesterday Justin Kestelyn over at the OTN blog announced a re-org of the blogs.oracle.com homepage. I was pleasantly surprised to see my own name listed among the likes of Werner Puschitz, Jonathan Lewis, Howard Rogers and my new locker buddy Laurent Schneider. Jeremy Schneider is conspicuously absent, hopefully that gets... [Read More]
What Is NULL?
Today in #oracle, Burk0 asked:<Burk0> mmm... got another problem... I'm using a "insert or update" trigger for my previous task. When I'm inserting a new row, I'd like the varchar field "oldvalue" to report "NA". I put an IF inside the trigger, checking if :old.id=null but that doesn't seem to... [Read More]