Quiz - Whose Answer is it Anyway?

December 2, 2011 An innocent question was asked in an OTN thread regarding the availability of plan stability options in the Standard Edition of Oracle Database.  If we check the documentation for the latest release (11.2.0.x) of Oracle Database, we will find the following statement: “The use of stored outlines is deprecated in Oracle Database 11g [...]

September 21, 2011 I have written a couple of blog articles on the topic of reading 10046 extended SQL trace files.  Some of those blog articles are listed below: 10046 Extended SQL Trace Interpretation 10046 Extended SQL Trace Interpretation 2 10046 Extended SQL Trace Interpretation 3 Brain Teaser: 10046 Extended SQL Trace Shows “EXEC #435118472:c=15600,e=510″, How is that Possible? [...]

September 18, 2011 I do not recall putting together any articles about inline views, so let’s start out with a couple of examples before taking a look at a quote.  We need to create a table for this example, so I will reuse a slightly modified table creation script from another article, and also collect [...]

September 16, 2011 While reading the Oracle 11g Performance Tuning Recipes book, I noticed that some of the recipes in chapter 10 seemed to have an odd familiarity, although as of yet I have not quite pinpointed where I had previously seen some of the concepts in chapter 10.  Recipes 10-2, 10-11, and 10-16 seem to share a common ancestry with [...]

September 5, 2011 I often look for easier ways to accomplish time consuming tasks, and I suspect that is part of the reason why I buy so many computer books.  In Recipe 2-5 (page 60) of the “Oracle Database 11g Performance Tuning Recipes” book there is a SQL statement to determine which database columns (owned [...]

September 1, 2011 I located another interesting statement in the “Oracle Database 11g Performance Tuning Recipes“ book, so I thought that it was time for another blog article that takes a look at a statement from the book.  Chapter 4 of the book is significantly better written (much more accurate) than chapter 3. To set the stage, [...]

August 28, 2011 The book “Oracle Database 11g Performance Tuning Recipes” is out of the alpha stage – if you bought the alpha version from Apress, you should now be able to download the finished book.  I am currently reviewing the book review notes that I started collecting when reading the alpha version, so that [...]

July 3, 2011 (Modified July 5, 2011) Define Yah-but: Almost like yeah but, but with one missing letter. While reading the alpha edition of the “Oracle Database 11g Performance Tuning Recipes” book, specifically recipe 5-19, I found a couple of interesting comments about the CURSOR_SHARING parameter, specifically the FORCE and SIMILAR parameter values.  The quotes (as [...]

June 28, 2011 While reading the alpha edition of the “Oracle Database 11g Performance Tuning Recipes” book, I noticed a couple of interesting SQL statements in Recipe 5-17 that just did not look right.  One of those SQL statements, slightly reformatted, appears below: SELECT   A.CURRENT_OBJ#,   O.OBJECT_NAME,   O.OBJECT_TYPE,   A.EVENT,   SUM(A.WAIT_TIME + [...]

June 19, 2011 Currently, the most viewed article in the past 90 days on this blog demonstrates a deadlock situation that is present in Oracle Database 11.1.0.6 and above that is not present in Oracle Database 10.2.0.1 through 10.2.0.5 (someone else might be able to check the earlier releases).  This particular deadlock was the result of [...]