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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-72941] Use compact diff format for updates to arrays using classic $addToSet operator</title>
                <link>https://jira.mongodb.org/browse/SERVER-72941</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When we use $addToSet to add an element to the array, the entire new array is recorded in the oplog. This leads to large change stream events.&lt;/p&gt;

&lt;p&gt;Today $addToSet does not guarantee a particular ordering of elements in the modified set, so it could be modified to always add the element to the end of the array, similar to $push, and produce message like { &apos;arrayField.100&apos;: &apos;value&apos; &#160;}&lt;/p&gt;</description>
                <environment></environment>
        <key id="2235234">SERVER-72941</key>
            <summary>Use compact diff format for updates to arrays using classic $addToSet operator</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="mickey.winters@mongodb.com">Mickey Winters</assignee>
                                    <reporter username="kateryna.kamenieva@mongodb.com">Katya Kamenieva</reporter>
                        <labels>
                            <label>query-product-scope-1</label>
                            <label>query-product-urgency-2</label>
                            <label>query-product-value-1</label>
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                <created>Tue, 17 Jan 2023 18:53:38 +0000</created>
                <updated>Sun, 29 Oct 2023 21:28:02 +0000</updated>
                            <resolved>Fri, 11 Aug 2023 14:11:17 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5629415" author="ian.ward" created="Fri, 11 Aug 2023 17:35:42 +0000"  >&lt;p&gt;Amazing!&#160;&lt;/p&gt;</comment>
                            <comment id="5628734" author="kateryna.kamenieva" created="Fri, 11 Aug 2023 14:16:41 +0000"  >&lt;p&gt;&#127881;&lt;/p&gt;</comment>
                            <comment id="5627601" author="xgen-internal-githook" created="Thu, 10 Aug 2023 23:41:09 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Mickey. J Winters&apos;, &apos;email&apos;: &apos;mickey.winters@mongodb.com&apos;, &apos;username&apos;: &apos;mjrb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-72941&quot; title=&quot;Use compact diff format for updates to arrays using classic $addToSet operator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-72941&quot;&gt;&lt;del&gt;SERVER-72941&lt;/del&gt;&lt;/a&gt;: use compact diff format for updates to arrays using classic $addToSet operator&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/188f9ed7511485f26614ec590e42db1d8f20eca2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/188f9ed7511485f26614ec590e42db1d8f20eca2&lt;/a&gt;&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="173593">SERVER-16484</issuekey>
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                            <issuelinktype id="10012">
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            <issuekey id="2181396">SERVER-71269</issuekey>
        </issuelink>
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            <issuekey id="2462787">DOCS-16424</issuekey>
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