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	<title>The Pythian Blog &#187; server variables</title>
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		<title>Contradiction for the Day</title>
		<link>http://www.pythian.com/news/2848/contradiction-for-the-day/</link>
		<comments>http://www.pythian.com/news/2848/contradiction-for-the-day/#comments</comments>
		<pubDate>Tue, 09 Jun 2009 20:36:07 +0000</pubDate>
		<dc:creator>Sheeri Cabral</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[dynamic variables]]></category>
		<category><![CDATA[server variables]]></category>
		<category><![CDATA[variables]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=2848</guid>
		<description><![CDATA[Today&#8217;s contradiction: MySQL has server variables named new and old. The new variable can be set per-session and globally, and is dynamic. The old variable is not dynamic, and only global in scope. Both default to FALSE in MySQL 5.1. According to the manual, the new variable: was used in MySQL 4.0 to turn on [...]]]></description>
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		<slash:comments>1</slash:comments>
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		<title>I apparently have_community_features</title>
		<link>http://www.pythian.com/news/2333/i-apparently-have_community_features/</link>
		<comments>http://www.pythian.com/news/2333/i-apparently-have_community_features/#comments</comments>
		<pubDate>Mon, 04 May 2009 19:45:29 +0000</pubDate>
		<dc:creator>Sheeri Cabral</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[community]]></category>
		<category><![CDATA[features]]></category>
		<category><![CDATA[have_community_features]]></category>
		<category><![CDATA[server variables]]></category>
		<category><![CDATA[variables]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=2333</guid>
		<description><![CDATA[Do you have_community_features? I do! SHOW GLOBAL VARIABLES LIKE 'have_community_features'; +-------------------------+-------+ &#124; Variable_name &#124; Value &#124; +-------------------------+-------+ &#124; have_community_features &#124; YES &#124; +-------------------------+-------+ 1 row in set (0.00 sec) I am pretty sure this is one of those variables that MySQL has put in as an unused placeholder, but for now, it is not even [...]]]></description>
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		<title>InnoDB logfiles</title>
		<link>http://www.pythian.com/news/1242/innodb-logfiles/</link>
		<comments>http://www.pythian.com/news/1242/innodb-logfiles/#comments</comments>
		<pubDate>Thu, 02 Oct 2008 00:10:48 +0000</pubDate>
		<dc:creator>Sheeri Cabral</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[InnoDB]]></category>
		<category><![CDATA[log]]></category>
		<category><![CDATA[redo]]></category>
		<category><![CDATA[server variables]]></category>
		<category><![CDATA[tuning]]></category>

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		<description><![CDATA[The unsung heroes of InnoDB are the logfiles. They are what makes InnoDB automatic crash recovery possible. Database administrators of other DBMS may be familiar with the concept of a &#8220;redo&#8221; log. When data is changed, affected data pages are changed in the innodb_buffer_pool. Then, the change is written to the redo log, which in [...]]]></description>
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		<slash:comments>12</slash:comments>
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