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	<title>Richard Foote's Oracle Blog</title>
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	<description>Focusing Specifically On Oracle Indexes, Database Administration and Some Great Music</description>
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		<title>Richard Foote's Oracle Blog</title>
		<link>http://richardfoote.wordpress.com</link>
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			<item>
		<title>An Index Only Performs How Much Work ???</title>
		<link>http://richardfoote.wordpress.com/2009/11/12/1094/</link>
		<comments>http://richardfoote.wordpress.com/2009/11/12/1094/#comments</comments>
		<pubDate>Thu, 12 Nov 2009 11:25:54 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Index Rebuild]]></category>
		<category><![CDATA[Oracle Indexes]]></category>
		<category><![CDATA[Oracle Myths]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1094</guid>
		<description><![CDATA[One of the main reasons suggested for performing periodic index rebuilds is to improve &#8220;performance&#8221;. After rebuilding indexes, applications now run so much faster. Users notice a significant improvement in performance. And so on.
 
There are of course situations when rebuilding specific indexes can indeed improve performance, here&#8217;s but one example I&#8217;ve discussed previously.
 
However, the question I [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1094&subd=richardfoote&ref=&feed=1" />]]></description>
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		<slash:comments>20</slash:comments>
	
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			<media:title type="html">Richard Foote</media:title>
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		<item>
		<title>Zurich and Paris: Nice Way To Spend A Week</title>
		<link>http://richardfoote.wordpress.com/2009/11/10/zurich-and-paris-nice-way-to-spend-a-week/</link>
		<comments>http://richardfoote.wordpress.com/2009/11/10/zurich-and-paris-nice-way-to-spend-a-week/#comments</comments>
		<pubDate>Mon, 09 Nov 2009 20:46:17 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Richard's Musings]]></category>
		<category><![CDATA[Travel]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1081</guid>
		<description><![CDATA[I&#8217;ve just returned from a bit of whirlwind visit to Europe, teaching my Index Internals Seminar in two lovely cities, Zurich in Switzerland and Paris in France.
Coming from Australia, everything is relatively new with nearly anything over a 100 years old regarded as historically significant. I therefore love visiting European cities which are so rich in history and where you [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1081&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/11/10/zurich-and-paris-nice-way-to-spend-a-week/feed/</wfw:commentRss>
		<slash:comments>6</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/6a78e8fa60b2eb46aa9c3c32c77a5af3?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Richard Foote</media:title>
		</media:content>

		<media:content url="http://richardfoote.files.wordpress.com/2009/11/2009-switzerland-france-0471.jpg" medium="image">
			<media:title type="html">2009 Switzerland France 047</media:title>
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		<media:content url="http://richardfoote.files.wordpress.com/2009/11/2009-switzerland-france-108.jpg" medium="image">
			<media:title type="html">2009 Switzerland France 108</media:title>
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	</item>
		<item>
		<title>Rebuilding Indexes Every Sunday Afternoon !!</title>
		<link>http://richardfoote.wordpress.com/2009/10/28/rebuilding-indexes-every-sunday-afternoon/</link>
		<comments>http://richardfoote.wordpress.com/2009/10/28/rebuilding-indexes-every-sunday-afternoon/#comments</comments>
		<pubDate>Wed, 28 Oct 2009 10:01:31 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Index Rebuild]]></category>
		<category><![CDATA[Oracle Indexes]]></category>
		<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1074</guid>
		<description><![CDATA[I just had to share this amusing article on &#8220;Scheduling Oracle Index Rebuilding&#8220;.
Regular readers of this blog can no doubt pick the various inaccuracies and strawman arguments with this article. It&#8217;s was nice however to reminisce and take a stroll down memory lane back to the 80&#8217;s and 90&#8217;s when many DBAs indeed did spend every Sunday afternoon rebuilding indexes and the [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1074&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/10/28/rebuilding-indexes-every-sunday-afternoon/feed/</wfw:commentRss>
		<slash:comments>52</slash:comments>
	
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			<media:title type="html">Richard Foote</media:title>
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		<title>Oracle OpenWorld &#8211; Day 5 Hightlights</title>
		<link>http://richardfoote.wordpress.com/2009/10/16/oracle-openworld-day-5-hightlights/</link>
		<comments>http://richardfoote.wordpress.com/2009/10/16/oracle-openworld-day-5-hightlights/#comments</comments>
		<pubDate>Thu, 15 Oct 2009 19:38:45 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Oracle OpenWorld]]></category>
		<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1070</guid>
		<description><![CDATA[Started the day desperate again for a coffee at the OTN lounge.
I was looking forward to catching Kevin Closson at the Unconference but unfortunately the session was cancelled at the last minute. So spent some time having a nice chat with Chris Muir and Tim Hall who I had the pleasure to meet when I attended the ODOUG conference in Monterey [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1070&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/10/16/oracle-openworld-day-5-hightlights/feed/</wfw:commentRss>
		<slash:comments>9</slash:comments>
	
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			<media:title type="html">Richard Foote</media:title>
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		<title>Oracle Openworld &#8211; Day 4 Highlights</title>
		<link>http://richardfoote.wordpress.com/2009/10/16/oracle-openworld-day-4-highlights/</link>
		<comments>http://richardfoote.wordpress.com/2009/10/16/oracle-openworld-day-4-highlights/#comments</comments>
		<pubDate>Thu, 15 Oct 2009 17:09:22 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Oracle OpenWorld]]></category>
		<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1063</guid>
		<description><![CDATA[I set out to reduce my pace today with only limited success.
My first session was to attended Alex Gorbachev and Paul Vallee&#8217;s Unconference session on how to make DBAs highly available. Interesting discussion on some of the various challenges confronting DBAs, such as controlling the balance between the need for stability and availability vs. the need of some organisations for [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1063&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/10/16/oracle-openworld-day-4-highlights/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/6a78e8fa60b2eb46aa9c3c32c77a5af3?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Richard Foote</media:title>
		</media:content>

		<media:content url="http://richardfoote.files.wordpress.com/2009/10/pa150822.jpg" medium="image">
			<media:title type="html">PA150822</media:title>
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		<title>Oracle OpenWorld 2009 &#8211; Day 3 Highlights</title>
		<link>http://richardfoote.wordpress.com/2009/10/15/oracle-openworld-2009-day-3-highlights/</link>
		<comments>http://richardfoote.wordpress.com/2009/10/15/oracle-openworld-2009-day-3-highlights/#comments</comments>
		<pubDate>Wed, 14 Oct 2009 18:06:32 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Oracle OpenWorld]]></category>
		<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1056</guid>
		<description><![CDATA[The first thing to note about day 3 is that it&#8217;s wet. I mean really really wet and really windy as well. Considering my home town of Canberra has been in drought now for many years with water restrictions in place, I haven&#8217;t seen this much rain for a very long time. That said, I believe [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1056&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/10/15/oracle-openworld-2009-day-3-highlights/feed/</wfw:commentRss>
		<slash:comments>6</slash:comments>
	
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			<media:title type="html">Richard Foote</media:title>
		</media:content>

		<media:content url="http://richardfoote.files.wordpress.com/2009/10/pa140820.jpg" medium="image">
			<media:title type="html">PA140820</media:title>
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		<title>Oracle OpenWorld 2009 &#8211; Day 2 Highlights</title>
		<link>http://richardfoote.wordpress.com/2009/10/14/oracle-openworld-2009-day-2-highlights/</link>
		<comments>http://richardfoote.wordpress.com/2009/10/14/oracle-openworld-2009-day-2-highlights/#comments</comments>
		<pubDate>Tue, 13 Oct 2009 18:56:21 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Oracle OpenWorld]]></category>
		<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1050</guid>
		<description><![CDATA[It&#8217;s been a busy day today.
The effects of drinking perhaps one too many margaritas at the Oracle ACE dinner last night meant I was in desperate need of my morning coffee to start the day. Thank goodness for the OTN lounge  
There were a number of announcements today but perhaps the main one from my perspective [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1050&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/10/14/oracle-openworld-2009-day-2-highlights/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/6a78e8fa60b2eb46aa9c3c32c77a5af3?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Richard Foote</media:title>
		</media:content>

		<media:content url="http://richardfoote.files.wordpress.com/2009/10/pa1308111.jpg" medium="image">
			<media:title type="html">PA130811</media:title>
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		<title>Oracle OpenWorld 2009 &#8211; So It Begins &#8230;</title>
		<link>http://richardfoote.wordpress.com/2009/10/12/oracle-openworld-2009-so-it-begins/</link>
		<comments>http://richardfoote.wordpress.com/2009/10/12/oracle-openworld-2009-so-it-begins/#comments</comments>
		<pubDate>Mon, 12 Oct 2009 00:30:38 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Oracle OpenWorld]]></category>
		<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1046</guid>
		<description><![CDATA[Wow, I&#8217;ve had one hell of a 2 week period !!
I&#8217;ve been travelling around the southern part of England with my son, as part of  a school football tour, with 22 other teenage boys. It&#8217;s been a lot of fun but it&#8217;s also been extremely tiring, getting up early each morning, packing in as much as possible [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1046&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/10/12/oracle-openworld-2009-so-it-begins/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Richard Foote</media:title>
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		<title>Unconference &#8211; Highlight of Oracle OpenWorld 2009</title>
		<link>http://richardfoote.wordpress.com/2009/09/23/unconference-highlight-of-oracle-openworld-2009/</link>
		<comments>http://richardfoote.wordpress.com/2009/09/23/unconference-highlight-of-oracle-openworld-2009/#comments</comments>
		<pubDate>Wed, 23 Sep 2009 12:45:40 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1042</guid>
		<description><![CDATA[I&#8217;m about to embark on another overseas adventure, this one taking me right around the world. I&#8217;ll first visit the country of my birth, England, for a few weeks before making my way across the Atlantic Ocean to attend Oracle OpenWorld in San Francisco.
This will be my second Oracle OpenWorld.  I already have a packed [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1042&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/09/23/unconference-highlight-of-oracle-openworld-2009/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/6a78e8fa60b2eb46aa9c3c32c77a5af3?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Richard Foote</media:title>
		</media:content>
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		<item>
		<title>The CBO CPU Costing Model and Indexes &#8211; Another Introduction</title>
		<link>http://richardfoote.wordpress.com/2009/09/16/the-cbo-cpu-costing-model-and-indexes-another-introduction/</link>
		<comments>http://richardfoote.wordpress.com/2009/09/16/the-cbo-cpu-costing-model-and-indexes-another-introduction/#comments</comments>
		<pubDate>Wed, 16 Sep 2009 12:51:29 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[CBO]]></category>
		<category><![CDATA[Index statistics]]></category>
		<category><![CDATA[Oracle Indexes]]></category>
		<category><![CDATA[System Statistics]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1036</guid>
		<description><![CDATA[I&#8217;ve previously discussed some basic concepts and formulas regarding how the CBO derives index related costings via the I/O costing model. Time to look at system statistics and the CPU costing model with specific regard to indexes.
 
The first point I would make is that the CPU costing model has some significant improvements over the older I/O [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1036&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/09/16/the-cbo-cpu-costing-model-and-indexes-another-introduction/feed/</wfw:commentRss>
		<slash:comments>10</slash:comments>
	
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			<media:title type="html">Richard Foote</media:title>
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		<title>Lanyon United Masters Div 3 Football Premiers 2009 (We Are The Champions)</title>
		<link>http://richardfoote.wordpress.com/2009/09/15/lanyon-united-masters-div-3-football-premiers-2009-we-are-the-champions/</link>
		<comments>http://richardfoote.wordpress.com/2009/09/15/lanyon-united-masters-div-3-football-premiers-2009-we-are-the-champions/#comments</comments>
		<pubDate>Tue, 15 Sep 2009 13:50:57 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1033</guid>
		<description><![CDATA[On Sunday mornings, I play for the mighty Lanyon United Football Club, in the Canberra Masters Division 3 competition. You need to be over 35 to compete, meaning it&#8217;s a league specifically for those  who are highly skilled, have years of previous experience but not handicapped with youthful exuberance  
In the previous 2 years, we [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1033&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/09/15/lanyon-united-masters-div-3-football-premiers-2009-we-are-the-champions/feed/</wfw:commentRss>
		<slash:comments>7</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/6a78e8fa60b2eb46aa9c3c32c77a5af3?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Richard Foote</media:title>
		</media:content>

		<media:content url="http://richardfoote.files.wordpress.com/2009/09/lanyon-2009-champions.jpg" medium="image">
			<media:title type="html">Lanyon 2009 Champions</media:title>
		</media:content>
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		<title>Malaysia and Tall Buildings</title>
		<link>http://richardfoote.wordpress.com/2009/09/07/malaysia-and-tall-buildings/</link>
		<comments>http://richardfoote.wordpress.com/2009/09/07/malaysia-and-tall-buildings/#comments</comments>
		<pubDate>Mon, 07 Sep 2009 13:07:54 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Richard's Musings]]></category>
		<category><![CDATA[Travel]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1027</guid>
		<description><![CDATA[Canberra is not only the capital of Australia, a fact not particularly well known outside our shores, but it&#8217;s also one of the most fabulous cities in the world in which to live. This last fact is not particularly well known within Australia either  
It&#8217;s a beautiful, peaceful city that offers a wonderful standard of [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1027&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/09/07/malaysia-and-tall-buildings/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/6a78e8fa60b2eb46aa9c3c32c77a5af3?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Richard Foote</media:title>
		</media:content>

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			<media:title type="html">Kuala Lumpur 2009 047</media:title>
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			<media:title type="html">Kuala Lumpur 2009 033</media:title>
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		<item>
		<title>OPTIMIZER_INDEX_CACHING Parameter</title>
		<link>http://richardfoote.wordpress.com/2009/09/01/optimizer_index_caching-parameter/</link>
		<comments>http://richardfoote.wordpress.com/2009/09/01/optimizer_index_caching-parameter/#comments</comments>
		<pubDate>Tue, 01 Sep 2009 02:44:05 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Oracle Cost Based Optimizer]]></category>
		<category><![CDATA[Oracle Indexes]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1014</guid>
		<description><![CDATA[As previously discussed, the CBO assumes the actual costs and overheads associated with all I/Os to be the same, regardless of the type of I/O, unless told otherwise via the optimizer_index_cost_adj parameter.
 
Another key assumption the CBO makes by default is that all I/Os will be physical I/Os (PIO) and so be relatively expensive to perform [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1014&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/09/01/optimizer_index_caching-parameter/feed/</wfw:commentRss>
		<slash:comments>7</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/6a78e8fa60b2eb46aa9c3c32c77a5af3?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Richard Foote</media:title>
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		<title>Demonizing Foreign Keys (&#8220;Helden&#8221;)</title>
		<link>http://richardfoote.wordpress.com/2009/08/25/demonizing-foreign-keys-helden/</link>
		<comments>http://richardfoote.wordpress.com/2009/08/25/demonizing-foreign-keys-helden/#comments</comments>
		<pubDate>Tue, 25 Aug 2009 13:45:43 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Foreign Keys]]></category>
		<category><![CDATA[Richard's Musings]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=1006</guid>
		<description><![CDATA[My mate Marcel Kratochvil, a fellow Canberran Oracle ACE Director and David Bowie fan, has recently published a paper finally called &#8220;Discussing Foreign Keys and their usage in the Database&#8221; in which (in his own words) he is &#8220;demonizing foreign keys&#8221;.
It&#8217;s a really good read, well worth the effort, in which covers various interesting topics [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=1006&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/08/25/demonizing-foreign-keys-helden/feed/</wfw:commentRss>
		<slash:comments>25</slash:comments>
	
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			<media:title type="html">Richard Foote</media:title>
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		<title>The CBO and Indexes: OPTIMIZER_INDEX_COST_ADJ Part III</title>
		<link>http://richardfoote.wordpress.com/2009/08/20/the-cbo-and-indexes-optimizer_index_cost_adj-part-iii/</link>
		<comments>http://richardfoote.wordpress.com/2009/08/20/the-cbo-and-indexes-optimizer_index_cost_adj-part-iii/#comments</comments>
		<pubDate>Thu, 20 Aug 2009 13:18:09 +0000</pubDate>
		<dc:creator>Richard Foote</dc:creator>
				<category><![CDATA[Index Access Path]]></category>
		<category><![CDATA[OPTIMIZER_INDEX_COST_ADJ]]></category>
		<category><![CDATA[Oracle Indexes]]></category>

		<guid isPermaLink="false">http://richardfoote.wordpress.com/?p=994</guid>
		<description><![CDATA[After a bit of a layoff to organise a few upcoming overseas trips, while watching plenty of Ashes Cricket and the brilliantly funny &#8221;Flight Of The Conchords&#8221; DVDs, it&#8217;s about time I got back to my humble little blog.
In Part II, we looked at a really bad way to set the optimizer_index_cost_adj parameter, by just setting it a [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=richardfoote.wordpress.com&blog=2301564&post=994&subd=richardfoote&ref=&feed=1" />]]></description>
		<wfw:commentRss>http://richardfoote.wordpress.com/2009/08/20/the-cbo-and-indexes-optimizer_index_cost_adj-part-iii/feed/</wfw:commentRss>
		<slash:comments>7</slash:comments>
	
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			<media:title type="html">Richard Foote</media:title>
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