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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-52974] Checking if destined recipient has changed for resharding creates another full copy of the updated document</title>
                <link>https://jira.mongodb.org/browse/SERVER-52974</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/cfa95825eebad3d8d9de0a4903523fd6a41184eb/src/mongo/bson/mutable/document.h#L541-L545&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mutablebson::Document::getObject() renders a full copy of the updated document&lt;/a&gt;. This can be expensive for larger documents. At minimum we should skip calling it when the collection isn&apos;t even sharded &lt;a href=&quot;https://github.com/mongodb/mongo/blob/cfa95825eebad3d8d9de0a4903523fd6a41184eb/src/mongo/db/exec/update_stage.cpp#L612-L616&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;like UpdateStage::checkUpdateChangesShardKeyFields() does&lt;/a&gt;. Better would be to consolidate some the &lt;tt&gt;&amp;#95;doc.getObject()&lt;/tt&gt; calls that UpdateStage::checkUpdateChangesShardKeyFields(), UpdateStage::wasReshardingKeyUpdated(), and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/cfa95825eebad3d8d9de0a4903523fd6a41184eb/src/mongo/db/exec/update_stage.cpp#L295&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;updates which weren&apos;t performed in-place&lt;/a&gt; all do.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1548414">SERVER-52974</key>
            <summary>Checking if destined recipient has changed for resharding creates another full copy of the updated document</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="13201">Fixed</resolution>
                                        <assignee username="max.hirschhorn@mongodb.com">Max Hirschhorn</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>PM-234-M2</label>
                            <label>PM-234-T-oplog-fetch</label>
                    </labels>
                <created>Fri, 20 Nov 2020 19:08:58 +0000</created>
                <updated>Sun, 29 Oct 2023 22:00:12 +0000</updated>
                            <resolved>Sat, 21 Nov 2020 03:47:14 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3500956" author="xgen-internal-githook" created="Sat, 21 Nov 2020 03:31:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Max Hirschhorn&apos;, &apos;email&apos;: &apos;max.hirschhorn@mongodb.com&apos;, &apos;username&apos;: &apos;visemet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52974&quot; title=&quot;Checking if destined recipient has changed for resharding creates another full copy of the updated document&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52974&quot;&gt;&lt;del&gt;SERVER-52974&lt;/del&gt;&lt;/a&gt; Avoid extra calls to _doc.getObject() in update codepath.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c65e9fc4390adfde4f3f551d5fcdd0415e028a6b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c65e9fc4390adfde4f3f551d5fcdd0415e028a6b&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1417724">SERVER-49825</issuekey>
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            <issuekey id="1778268">SERVER-57666</issuekey>
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            <issuekey id="1834117">SERVER-58918</issuekey>
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