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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-28587] MongoDB aggregation query slowness</title>
                <link>https://jira.mongodb.org/browse/SERVER-28587</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Will MongoDB use Index Intersection during the execution of aggregate query?&lt;br/&gt;
Can $group operation makes use of indexing to fasten the aggregate query execution.&lt;/p&gt;

&lt;p&gt;Or, is the database engine bound to use a maximum of 1 index per query except in the case of $or operations?&lt;/p&gt;</description>
                <environment></environment>
        <key id="370430">SERVER-28587</key>
            <summary>MongoDB aggregation query slowness</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="mark.agarunov">Mark Agarunov</assignee>
                                    <reporter username="medikosr">Srikanth M</reporter>
                        <labels>
                    </labels>
                <created>Mon, 3 Apr 2017 16:30:12 +0000</created>
                <updated>Wed, 31 May 2017 21:23:30 +0000</updated>
                            <resolved>Fri, 7 Apr 2017 20:46:05 +0000</resolved>
                                    <version>3.2.8</version>
                                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1544078" author="mark.agarunov" created="Fri, 7 Apr 2017 20:44:58 +0000"  >&lt;p&gt;Hello &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=medikosr&quot; class=&quot;user-hover&quot; rel=&quot;medikosr&quot;&gt;medikosr&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for the report. While &lt;a href=&quot;https://docs.mongodb.com/manual/core/index-intersection/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MongoDB does support index intersection&lt;/a&gt;, it currently isn&apos;t generally used. This issue looks to be the same as those described in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22741&quot; title=&quot;Ability to hint index intersection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22741&quot;&gt;SERVER-22741&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-13740&quot; title=&quot;Improve plan ranking for index intersection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-13740&quot;&gt;SERVER-13740&lt;/a&gt;, so I&apos;ve closed this as a duplicate. Please follow those issues for any updates on this issue.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Mark&lt;/p&gt;</comment>
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