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	<title>The Pythian Blog &#187; bind peeking</title>
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		<title>Stabilize Oracle Bind Peeking Behaviour with Range-Based Predicates</title>
		<link>http://www.pythian.com/news/1022/stabilize-oracle-bind-peeking-behaviour-with-range-based-predicates/</link>
		<comments>http://www.pythian.com/news/1022/stabilize-oracle-bind-peeking-behaviour-with-range-based-predicates/#comments</comments>
		<pubDate>Wed, 28 May 2008 18:40:30 +0000</pubDate>
		<dc:creator>Alex Fatkulin</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[bind peeking]]></category>
		<category><![CDATA[range-based predicates]]></category>

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		<description><![CDATA[In my previous post, I described the most common cause for unstable plans due to bind peeking &#8212; histograms. It is now time to move forward and take a look at another case, namely range-based predicates. Strictly speaking, the cases I&#8217;m going to describe can appear without range-based predicates as well, you just need to [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Stabilize Oracle 10G&#8217;s Bind Peeking Behaviour by Cutting Histograms</title>
		<link>http://www.pythian.com/news/867/stabilize-oracle-10gs-bind-peeking-behaviour-by-cutting-histograms/</link>
		<comments>http://www.pythian.com/news/867/stabilize-oracle-10gs-bind-peeking-behaviour-by-cutting-histograms/#comments</comments>
		<pubDate>Tue, 18 Mar 2008 18:48:11 +0000</pubDate>
		<dc:creator>Alex Fatkulin</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[bind peeking]]></category>
		<category><![CDATA[histograms]]></category>
		<category><![CDATA[Oracle 10g]]></category>

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		<description><![CDATA[I wrote this post because I feel there is a great need for it. The number of people struggling with unstable query plans due to bind peeking in Oracle 10G is enormous, to say the least. More than that, solutions like disabling bind variable peeking are driving us away from understanding the root cause of [...]]]></description>
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		<slash:comments>37</slash:comments>
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		<title>Bind Peeking, Ad Hoc Queries, Stable Performance. On 10G you can only pick any two.</title>
		<link>http://www.pythian.com/news/820/bind-peeking-ad-hoc-queries-stable-performance-on-10g-you-can-only-pick-any-two/</link>
		<comments>http://www.pythian.com/news/820/bind-peeking-ad-hoc-queries-stable-performance-on-10g-you-can-only-pick-any-two/#comments</comments>
		<pubDate>Wed, 12 Mar 2008 13:04:26 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[bind peeking]]></category>
		<category><![CDATA[col_usage$]]></category>
		<category><![CDATA[random performance]]></category>
		<category><![CDATA[statistics]]></category>

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		<description><![CDATA[I got to troubleshoot an amazing situation a few weeks ago. I think, we can all agree that assuming we are on a supported configuration of a production release of Oracle, it is essentially inconceivable that allowing a single query to run on your system can flip another queryâ€™s plans and cause major performance issues [...]]]></description>
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