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    <title>MongoDB Jira</title>
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    <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-73028] Investigate need of new index for auto-merging</title>
                <link>https://jira.mongodb.org/browse/SERVER-73028</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The code committed &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-72283&quot; title=&quot;Take into account mergeability constraints in` mergeAllChunksOnShard`&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-72283&quot;&gt;&lt;del&gt;SERVER-72283&lt;/del&gt;&lt;/a&gt; is performing a query on &lt;em&gt;config.chunks&lt;/em&gt; extracting chunks on fields &lt;em&gt;&amp;lt;uuid, shard, forceJumbo, onCurrentShardSince&amp;gt;&lt;/em&gt; and ordering the result by &lt;em&gt;min&lt;/em&gt;.&lt;/p&gt;

&lt;p&gt;Aim of this ticket is to investigate whether to:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Simply keep the existing index on &lt;em&gt;&amp;lt;uuid, shard, min&amp;gt;&lt;/em&gt;&lt;br/&gt;
OR&lt;/li&gt;
	&lt;li&gt;Remove the index existing index and create a new one with more fields: &lt;em&gt;&amp;lt;uuid, shard, min, onCurrentShardSince, jumbo&amp;gt;&lt;/em&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Additionally, a new index will be added for the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/34997f66dfa58a7f91414e5f21a139d4bdd7038f/src/mongo/db/s/balancer/auto_merger_policy.cpp#L187-L253&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;initial query&lt;/a&gt; performed by the auto-merger to identify &amp;lt;shards, nss&amp;gt; tuples for which it is possible to issue auto-merge requests.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2236960">SERVER-73028</key>
            <summary>Investigate need of new index for auto-merging</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="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                    </labels>
                <created>Thu, 19 Jan 2023 08:17:25 +0000</created>
                <updated>Sun, 29 Oct 2023 21:27:53 +0000</updated>
                            <resolved>Tue, 7 Mar 2023 12:16:51 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5255043" author="xgen-internal-githook" created="Tue, 7 Mar 2023 11:59:13 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Pierlauro Sciarelli&apos;, &apos;email&apos;: &apos;pierlauro.sciarelli@mongodb.com&apos;, &apos;username&apos;: &apos;pierlauro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73028&quot; title=&quot;Investigate need of new index for auto-merging&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73028&quot;&gt;&lt;del&gt;SERVER-73028&lt;/del&gt;&lt;/a&gt; Add index supporting automerger query on `config.chunks`&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7208ec2715d1726451d9aaf730d2bc9b3969e15d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7208ec2715d1726451d9aaf730d2bc9b3969e15d&lt;/a&gt;&lt;/p&gt;</comment>
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