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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>[DOCS-14565] Investigate changes in SERVER-55430: Record metrics about whether a collection is rebalanced after resharding op finishes </title>
                <link>https://jira.mongodb.org/browse/DOCS-14565</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
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&lt;p&gt;New field added to serverStatus metrics under shardingStatistics.resharding: lastOpEndingChunkImbalance. This field contains the largest diff (maxNumChunksInShard - minNumChunksInShard) among all zones for the collection that went through the last resharding operation. This is only updated on the config servers.&lt;/p&gt;
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&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;

&lt;p&gt;Resharding attempts to create an initial chunk distribution such that the collection will not be rebalanced by the balancer immediately after (absent of any topology changes, etc of course). It would be useful to collect metrics on whether the balancer rebalances a collection that has just been resharded in order to determine whether resharding&apos;s initial split policy is in fact creating a good initial distribution.&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;
&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;
&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;
&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;</description>
                <environment></environment>
        <key id="1780705">DOCS-14565</key>
            <summary>Investigate changes in SERVER-55430: Record metrics about whether a collection is rebalanced after resharding op finishes </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="ian.fogelman@mongodb.com">Ian Fogelman</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Mon, 14 Jun 2021 17:29:12 +0000</created>
                <updated>Mon, 13 Nov 2023 17:52:28 +0000</updated>
                            <resolved>Thu, 30 Sep 2021 19:53:49 +0000</resolved>
                                                    <fixVersion>5.0.0-rc3</fixVersion>
                    <fixVersion>5.1.0-rc0</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4095136" author="xgen-internal-githook" created="Thu, 30 Sep 2021 19:40:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;ian fogelman&apos;, &apos;email&apos;: &apos;ian.fogelman@mongodb.com&apos;, &apos;username&apos;: &apos;ianf-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14565&quot; title=&quot;Investigate changes in SERVER-55430: Record metrics about whether a collection is rebalanced after resharding op finishes &quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14565&quot;&gt;&lt;del&gt;DOCS-14565&lt;/del&gt;&lt;/a&gt; serverStatus lastOpEndingChunkImbalance&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/e54136b979a77667a7a405818a067269d1dfce1b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/e54136b979a77667a7a405818a067269d1dfce1b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4094017" author="JIRAUSER1260683" created="Thu, 30 Sep 2021 13:31:25 +0000"  >&lt;p&gt;Hi Randolph, one extra questions I had with this one is given that it is a backport to 5.0, do you think the 5.1 release-notes should be updated or the 5.0 release-notes?&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1795707">DOCS-14595</issuekey>
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