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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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            <title>[SERVER-35003] Consider making the balancer threshold to always be 1</title>
                <link>https://jira.mongodb.org/browse/SERVER-35003</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.7.9/src/mongo/db/s/balancer/balancer_policy.cpp#L391&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This is the threshold in question&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Additionally, when the balancer threshold is set to 1, there is no longer a need for the aggressiveBalancerHint. &lt;/p&gt;

&lt;p&gt;Background:&lt;br/&gt;
Because of the way how thresholds are &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.7.9/src/mongo/db/s/balancer/balancer_policy.cpp#L423&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;computed&lt;/a&gt;, it is possible that the balancer won&apos;t take action after a single new shard is added to the cluster. Lowering the threshold can help in this scenario. We should also remove the part where we take the ceiling of the threshold and keep the fractional component when comparing thresholds in order to not be overly aggressive.&lt;/p&gt;</description>
                <environment></environment>
        <key id="544337">SERVER-35003</key>
            <summary>Consider making the balancer threshold to always be 1</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="13201">Fixed</resolution>
                                        <assignee username="sarah.zhou@mongodb.com">Sarah Zhou</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Tue, 15 May 2018 19:47:05 +0000</created>
                <updated>Sun, 29 Oct 2023 22:31:48 +0000</updated>
                            <resolved>Mon, 13 Aug 2018 17:28:59 +0000</resolved>
                                                    <fixVersion>4.0.2</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1974329" author="xgen-internal-githook" created="Mon, 13 Aug 2018 17:26:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sarah Zhou&apos;, &apos;email&apos;: &apos;sarah.zhou@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35003&quot; title=&quot;Consider making the balancer threshold to always be 1&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35003&quot;&gt;&lt;del&gt;SERVER-35003&lt;/del&gt;&lt;/a&gt; Consider making the balancer threshold to always be 1&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/29d08f189860ae4e99aa5bc070b182c3249ce68a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/29d08f189860ae4e99aa5bc070b182c3249ce68a&lt;/a&gt;&lt;/p&gt;</comment>
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