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	<title>Comments on: Knowing what you want can make a huge difference (&#8230;with pymongo)</title>
	<atom:link href="http://blog.mozilla.org/webdev/2011/08/17/knowing-what-you-want-pymongo/feed/" rel="self" type="application/rss+xml" />
	<link>http://blog.mozilla.org/webdev/2011/08/17/knowing-what-you-want-pymongo/</link>
	<description>Engineering the web</description>
	<lastBuildDate>Fri, 17 May 2013 21:43:21 +0000</lastBuildDate>
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		<title>By: Dave Brondsema</title>
		<link>http://blog.mozilla.org/webdev/2011/08/17/knowing-what-you-want-pymongo/comment-page-1/#comment-217298</link>
		<dc:creator>Dave Brondsema</dc:creator>
		<pubDate>Mon, 22 Aug 2011 14:14:19 +0000</pubDate>
		<guid isPermaLink="false">http://blog.mozilla.org/webdev/?p=1945#comment-217298</guid>
		<description><![CDATA[Map/reduce (or any other javascript) in mongo queries will probably grab a lock.  See http://www.mongodb.org/display/DOCS/How+does+concurrency+work#Howdoesconcurrencywork-OnJavascript   So performance testing should be on a loaded active server, not with single standalone queries.  And I&#039;d recommend against it, it often is problematic due to the locks.]]></description>
		<content:encoded><![CDATA[<p>Map/reduce (or any other javascript) in mongo queries will probably grab a lock.  See <a href="http://www.mongodb.org/display/DOCS/How+does+concurrency+work#Howdoesconcurrencywork-OnJavascript" rel="nofollow">http://www.mongodb.org/display/DOCS/How+does+concurrency+work#Howdoesconcurrencywork-OnJavascript</a>   So performance testing should be on a loaded active server, not with single standalone queries.  And I&#8217;d recommend against it, it often is problematic due to the locks.</p>
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		<title>By: Anderson Cardoso</title>
		<link>http://blog.mozilla.org/webdev/2011/08/17/knowing-what-you-want-pymongo/comment-page-1/#comment-217223</link>
		<dc:creator>Anderson Cardoso</dc:creator>
		<pubDate>Wed, 17 Aug 2011 23:46:56 +0000</pubDate>
		<guid isPermaLink="false">http://blog.mozilla.org/webdev/?p=1945#comment-217223</guid>
		<description><![CDATA[Nice post, thanks =]]]></description>
		<content:encoded><![CDATA[<p>Nice post, thanks =]</p>
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