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            <title>[SERVER-7742] Improve the way indexes are used to do a range query on one field and sort on another</title>
                <link>https://jira.mongodb.org/browse/SERVER-7742</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &quot;Equality, Range Query, And Sort&quot; section of Jesse&apos;s blog post &lt;a href=&quot;http://emptysquare.net/blog/optimizing-mongodb-compound-indexes/#equality-range-sort&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; describes how if you do a range query on one field and sort on another you have to choose between lowering your nscanned or getting rid of the in-memory sort.  If you put the sort key first, you get rid of the in-memory sort, but at the cost of higher nscanned.  If you put the sort key last, however, you can get nscanned down to exactly n, but you&apos;ll have to do an in-memory sort.&lt;/p&gt;</description>
                <environment></environment>
        <key id="57154">SERVER-7742</key>
            <summary>Improve the way indexes are used to do a range query on one field and sort on another</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
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                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Wed, 21 Nov 2012 17:57:00 +0000</created>
                <updated>Mon, 23 Sep 2013 22:20:03 +0000</updated>
                            <resolved>Mon, 23 Sep 2013 22:20:03 +0000</resolved>
                                                                    <component>Index Maintenance</component>
                                        <votes>2</votes>
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