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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[DOCS-8863] Comment on: &quot;manual/reference/operator/aggregation/limit.txt&quot;</title>
                <link>https://jira.mongodb.org/browse/DOCS-8863</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;We seem to have encountered a performance problem with $limit in aggregate queries. &lt;/p&gt;

&lt;p&gt;The query is very very slow (half a minute) - when the number of docs passed into the limit step are &lt;b&gt;less than the limit size&lt;/b&gt;. &lt;/p&gt;

&lt;p&gt;For example, first stage is a $match that only finds 6 docs. Second stage is a sort on an indexed field. Third is a $limit=10.&lt;/p&gt;

&lt;p&gt;The query is instantaneous when there are lots of docs returned from stage 1. However, when there are only a few, the aggregate query is very very slow. &lt;/p&gt;

&lt;p&gt;Expected behavior: aggregate performance of $limit should be equivalent to a standard query&apos;s use of limit. &lt;/p&gt;</description>
                <environment>&lt;br/&gt;
&lt;br/&gt;
*Location*: &lt;a href=&quot;https://docs.mongodb.com/manual/reference/operator/aggregation/limit/&quot;&gt;https://docs.mongodb.com/manual/reference/operator/aggregation/limit/&lt;/a&gt;&lt;br/&gt;
*User-Agent*: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36&lt;br/&gt;
*Referrer*: &lt;a href=&quot;https://www.google.com/&quot;&gt;https://www.google.com/&lt;/a&gt;&lt;br/&gt;
*Screen Resolution*: 1440 x 900&lt;br/&gt;
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        <key id="318870">DOCS-8863</key>
            <summary>Comment on: &quot;manual/reference/operator/aggregation/limit.txt&quot;</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>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="dan@prattle.co">Dan Salmo</reporter>
                        <labels>
                            <label>collector-298ba4e7</label>
                    </labels>
                <created>Mon, 26 Sep 2016 16:36:11 +0000</created>
                <updated>Fri, 3 Nov 2017 11:09:49 +0000</updated>
                            <resolved>Mon, 26 Sep 2016 19:34:00 +0000</resolved>
                                                                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1393920" author="allison.moore@10gen.com" created="Mon, 26 Sep 2016 19:33:46 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=dan%40prattle.co&quot; class=&quot;user-hover&quot; rel=&quot;dan@prattle.co&quot;&gt;dan@prattle.co&lt;/a&gt; Thanks for your ticket! This jira project (the Docs one) is specifically for issues related to the MongoDB documentation&#8230; your issue sounds like it might be a bug in the server, since, as you say, that&apos;s not the behavior one might expect. &lt;/p&gt;

&lt;p&gt;I would suggest filing a ticket in the Core Server project (&lt;a href=&quot;https://jira.mongodb.org/secure/CreateIssue!default.jspa?pid=10000&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/secure/CreateIssue!default.jspa?pid=10000&lt;/a&gt;) so that our engineers can investigate. Thanks!&lt;/p&gt;</comment>
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