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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-7656] Optimize aggregation on sharded setup if first stage is exact match on shard key</title>
                <link>https://jira.mongodb.org/browse/SERVER-7656</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If only one shard is involved in an aggregate operation, handle this like an aggregation on non-sharded setups. &lt;/p&gt;

&lt;p&gt;This will improve performance and reduce memory and network activity for many sharded setups, where the shardkey is for example the userId.&lt;/p&gt;</description>
                <environment></environment>
        <key id="56286">SERVER-7656</key>
            <summary>Optimize aggregation on sharded setup if first stage is exact match on shard key</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="charlie.swanson@mongodb.com">Charlie Swanson</assignee>
                                    <reporter username="notz">Gernot Pansy</reporter>
                        <labels>
                    </labels>
                <created>Tue, 13 Nov 2012 23:07:27 +0000</created>
                <updated>Thu, 24 Mar 2016 13:14:31 +0000</updated>
                            <resolved>Thu, 28 May 2015 16:47:20 +0000</resolved>
                                                    <fixVersion>3.0.9</fixVersion>
                    <fixVersion>3.1.4</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="1133818" author="xgen-internal-githook" created="Wed, 13 Jan 2016 17:03:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;cswanson310&apos;, u&apos;name&apos;: u&apos;Charlie Swanson&apos;, u&apos;email&apos;: u&apos;charlie.swanson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7656&quot; title=&quot;Optimize aggregation on sharded setup if first stage is exact match on shard key&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7656&quot;&gt;&lt;del&gt;SERVER-7656&lt;/del&gt;&lt;/a&gt; Execute aggregation command on targeted shard if first stage is an exact match on shard key&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3eeeaec1d1fbb41d1914e82deca2cac4fccdddc2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3eeeaec1d1fbb41d1914e82deca2cac4fccdddc2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="926179" author="xgen-internal-githook" created="Thu, 28 May 2015 16:37:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;cswanson310&apos;, u&apos;name&apos;: u&apos;Charlie Swanson&apos;, u&apos;email&apos;: u&apos;charlie.swanson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7656&quot; title=&quot;Optimize aggregation on sharded setup if first stage is exact match on shard key&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7656&quot;&gt;&lt;del&gt;SERVER-7656&lt;/del&gt;&lt;/a&gt; Execute aggregation command on targeted shard if first stage is exact match on shard key&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7d526bbc47681fd297d38cdc577a9a7d710f7a99&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7d526bbc47681fd297d38cdc577a9a7d710f7a99&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="203734">SERVER-18444</issuekey>
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            <issuekey id="274794">SERVER-23330</issuekey>
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