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	<title>The Pythian Blog &#187; internals</title>
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		<title>Oracle GoldenGate Extract Internals, Part III</title>
		<link>http://www.pythian.com/news/7617/oracle-goldengate-extract-internals-part-iii/</link>
		<comments>http://www.pythian.com/news/7617/oracle-goldengate-extract-internals-part-iii/#comments</comments>
		<pubDate>Wed, 03 Feb 2010 22:27:32 +0000</pubDate>
		<dc:creator>Alex Fatkulin</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[GoldenGate]]></category>
		<category><![CDATA[internals]]></category>
		<category><![CDATA[performance]]></category>
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		<description><![CDATA[This is the third post in Oracle GoldenGate Extract Internals series (links to part I and part II). In this post, we&#8217;re going to take a closer look at various queries that the Extract process uses against the database. As before, we will start by examining the strace output: nanosleep({1, 0}, NULL) = 0 ... [...]]]></description>
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		<slash:comments>5</slash:comments>
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		<title>Oracle GoldenGate Extract Internals, Part II</title>
		<link>http://www.pythian.com/news/7459/oracle-goldengate-extract-internals-part-ii/</link>
		<comments>http://www.pythian.com/news/7459/oracle-goldengate-extract-internals-part-ii/#comments</comments>
		<pubDate>Tue, 26 Jan 2010 21:01:55 +0000</pubDate>
		<dc:creator>Alex Fatkulin</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[GoldenGate]]></category>
		<category><![CDATA[internals]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[tracing]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=7459</guid>
		<description><![CDATA[Today we continue looking at various aspects of how the Oracle GoldenGate extract process works. One of the follow up questions to part I was about the way the Extract process reads from ASM storage. I&#8217;ve provided the answer, however, today we&#8217;re going get a detailed look at how the Extract process interacts with an [...]]]></description>
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		<slash:comments>5</slash:comments>
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		<item>
		<title>How to Find Objects Creating nologging Changes</title>
		<link>http://www.pythian.com/news/1209/how-to-find-objects-creating-nologging-changes/</link>
		<comments>http://www.pythian.com/news/1209/how-to-find-objects-creating-nologging-changes/#comments</comments>
		<pubDate>Thu, 04 Sep 2008 19:44:09 +0000</pubDate>
		<dc:creator>Riyaj Shamsudeen</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[internals]]></category>
		<category><![CDATA[nologging]]></category>
		<category><![CDATA[redo logging]]></category>
		<category><![CDATA[standbys]]></category>

		<guid isPermaLink="false">http://www.pythian.com/blogs/1209/how-to-find-objects-creating-nologging-changes</guid>
		<description><![CDATA[In an Oracle-l thread, this question was raised: how can you find objects creating nologging changes? First, what is a &#8216;nologging&#8217; change? The redo logging mechanism plays critical role in media recovery. Media recovery relies on archivelog files generated to roll the database forward. A standby database or dataguard recovery also relies on archivelog files. [...]]]></description>
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		<slash:comments>1</slash:comments>
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		<item>
		<title>ORA-01450 During Online Index Rebuild</title>
		<link>http://www.pythian.com/news/1111/ora-01450-during-online-index-rebuild/</link>
		<comments>http://www.pythian.com/news/1111/ora-01450-during-online-index-rebuild/#comments</comments>
		<pubDate>Fri, 04 Jul 2008 19:54:18 +0000</pubDate>
		<dc:creator>Alex Gorbachev</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[index rebuild]]></category>
		<category><![CDATA[indexes]]></category>
		<category><![CDATA[internals]]></category>
		<category><![CDATA[IOT]]></category>
		<category><![CDATA[online]]></category>
		<category><![CDATA[ora-01450]]></category>

		<guid isPermaLink="false">http://www.pythian.com/blogs/1111/ora-01450-during-online-index-rebuild</guid>
		<description><![CDATA[We hit an ORA-01450 error today trying to do online rebuild for an index in an unusable state. This was a non-unique index on a fairly large column &#8212; VARCHAR2(800 CHAR). SQL> alter index i1 rebuild online; alter index i1 rebuild online * ERROR at line 1: ORA-00604: error occurred at recursive SQL level 1 [...]]]></description>
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		<slash:comments>8</slash:comments>
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