|
Sizing of Oracle10g Indexes |
|
MikeA
|
Wednesday, April 04, 2007 9:15 AM
|
|
|
|
In my last blog entry we looked at sizing tables in 10g, of course the other side of that coin is the sizing of indexes. As with tables the Oracle8 manuals had an explanation of how to size indexes, but manuals since then have been strangely silent on the subject. In this blog I will address the sizing of normal, b-tree ...
|
 |
|
|
Read More...
|
|
|
Sizing Tables in Oracle |
|
MikeA
|
Friday, March 16, 2007 9:22 AM
|
|
|
|
On one of my first Oracle consulting assignments I had to come up with the sizing estimates for tables for a data warehouse for a telecommunications company in California. At that time, (1994) there were few products that provided sizing al ...
|
|
|
|
|
Read More...
|
|
|
How is Oracle Like Scuba Diving? |
|
MikeA
|
Wednesday, February 21, 2007 4:08 PM
|
|
|
|
One of my favorite things to do (when I am not tuning and managing Oracle databases) is to don a scuba tank, mask, and exposure suit and slip beneath the waters surface. For a long time I wondered how to reconcile these two interests and then it came to me.
|
|
|
Read More...
|
|
|
Tuning UNDO Segments |
|
MikeA
|
Monday, January 29, 2007 9:03 PM
|
|
|
|
Of the many databases I have examined on releases 9i and 10g, most are using the automatic undo management feature and on the whole it does a pretty good job of managing the undo segments (for you other old timers, rollback segments).
|
|
|
Read More...
|
|
|
Hidden Costs |
|
MikeA
|
Monday, January 08, 2007 9:40 AM
|
|
|
|
Caveat Emptor (Buyer beware) has been around since, well, since time began. Whether barter or cash, when doing a deal the buyer has to careful, this is especially true in the complex area of software licensing.
|
|
|
|
|
Read More...
|
|
|
Tailoring Session Parameters |
|
MikeA
|
Tuesday, December 26, 2006 5:03 PM
|
|
|
|
Many times I am asked how to tailor the initialization parameters for a specific process or user. Essentially the easiest way to set custom initialization parameters for a particular session is to use the ALTER SESSION SET command in a logon trigger keyed to a specific schema or schemas. For example, say we had an application where we wanted to set ...
|
|
|
|
|
Read More...
|
|
|
Removing 10g Grid Control |
|
MikeA
|
Thursday, December 14, 2006 12:36 PM
|
|
|
|
I recently went on a very nice vacation to Curacao. Before I went on vacation the Oracle 10g Grid Control (10.2.0.2) I had installed on my Laptop for monitoring my home office systems was working. I took my laptop with me to allow offload of pictures from my cameras and to track email while I was away. When I returned home and hooked my laptop back up to my home network Grid Control wouldn’t start and of course ...
|
|
|
|
|
Read More...
|
|
|
Watching Your ASMM in Oracle10g |
|
MikeA
|
Monday, November 27, 2006 8:44 AM
|
|
|
|
Oracle’s Oracle10g requires more memory than was ever required before. If you utilize any of the new features such as automatic storage management (ASM) and automatic shared memory management (ASMM) then you really need to pay attention to what memory is doing in 10g.
|
|
|
|
|
Read More...
|
|
|
The Brave New World of Oracle Management |
|
MikeA
|
Wednesday, November 15, 2006 3:50 PM
|
|
|
|
I remember reading “Brave New World” when I was in high school, we needn’t mention the year. I was fascinated by the system described in the book that seemed so logical on the surface but needed so many props underneath to keep it going. It reminds me at times of some of the Oracle management that goes on these days. ...
|
|
|
|
|
Read More...
|
|
|
Why Can’t Johnny Tune? |
|
MikeA
|
Wednesday, November 08, 2006 1:46 PM
|
|
|
|
I often see DBAs and developers who don’t know the first thing about tuning SQL. They ask “Why do I need to know that, can’t Oracle tune itself?” The truth of the matter is that Oracle is, for the most part, able to do a pretty decent job of tuning itself if it is given enough information and the queries or tuning tas ...
|
|
|
|
|
Read More...
|
|