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		<title>Oracle Parallel Query Sorting and Index Creation Performance Problems</title>
		<link>http://www.pythian.com/news/5379/oracle-parallel-query-sorting-performance-problems/</link>
		<comments>http://www.pythian.com/news/5379/oracle-parallel-query-sorting-performance-problems/#comments</comments>
		<pubDate>Mon, 16 Nov 2009 19:34:10 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[11.2]]></category>
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		<category><![CDATA[PQ sort]]></category>

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		<description><![CDATA[Ever wondered why recreating certain indexes takes forever, even when you do so in parallel? Ever wondered why certain PQ queries just don&#8217;t run that fast? Here&#8217;s a serious performance bug that&#8217;s been in Oracle for a while, and finally there are hints of it been fixed, but only partially. The bug happens when performing [...]]]></description>
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