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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-65649] Apply a 1-second throttling to the sequence of merge/split chunk commands issued by the Balancer</title>
                <link>https://jira.mongodb.org/browse/SERVER-65649</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The collection defragmentation algorithm and the cluster chunks resize policy generate a continuous stream of &lt;tt&gt;mergeChunks&lt;/tt&gt; and &lt;tt&gt;splitChunk&lt;/tt&gt; commands issued by one of the balancer thread: each operation, when committed, triggers a refresh of the metadata caches on the secondary nodes of the affected shards (details in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62698&quot; title=&quot;Do not clear filtering metadata on secondaries upon minor version updates&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62698&quot;&gt;&lt;del&gt;SERVER-62698&lt;/del&gt;&lt;/a&gt;), introducing some latency to concurrent CRUD operations.&lt;/p&gt;

&lt;p&gt;In order to limit the performance impact, the rate of &lt;tt&gt;mergeChunks&lt;/tt&gt; and &lt;tt&gt;splitChunk&lt;/tt&gt; requests needs to be throttled. &lt;/p&gt;
</description>
                <environment></environment>
        <key id="2025231">SERVER-65649</key>
            <summary>Apply a 1-second throttling to the sequence of merge/split chunk commands issued by the Balancer</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="paolo.polato@mongodb.com">Paolo Polato</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                    </labels>
                <created>Thu, 14 Apr 2022 12:32:21 +0000</created>
                <updated>Sun, 29 Oct 2023 21:39:27 +0000</updated>
                            <resolved>Thu, 28 Apr 2022 14:57:07 +0000</resolved>
                                                    <fixVersion>6.0.0-rc4</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4521952" author="xgen-internal-githook" created="Tue, 3 May 2022 09:24:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Paolo Polato&apos;, &apos;email&apos;: &apos;paolo.polato@mongodb.com&apos;, &apos;username&apos;: &apos;ppolato&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65649&quot; title=&quot;Apply a 1-second throttling to the sequence of merge/split chunk commands issued by the Balancer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65649&quot;&gt;&lt;del&gt;SERVER-65649&lt;/del&gt;&lt;/a&gt; Throttle merge/split chunk ops issued by the balancer&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 91c4696df9e3fb1890cc51cef77d29ac7cbeec81)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5e73659a3ce2b81cba05642b9913a0b7439465b7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5e73659a3ce2b81cba05642b9913a0b7439465b7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4512527" author="xgen-internal-githook" created="Thu, 28 Apr 2022 11:20:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Paolo Polato&apos;, &apos;email&apos;: &apos;paolo.polato@mongodb.com&apos;, &apos;username&apos;: &apos;ppolato&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65649&quot; title=&quot;Apply a 1-second throttling to the sequence of merge/split chunk commands issued by the Balancer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65649&quot;&gt;&lt;del&gt;SERVER-65649&lt;/del&gt;&lt;/a&gt; Throttle merge/split chunk ops issued by the balancer&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/91c4696df9e3fb1890cc51cef77d29ac7cbeec81&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/91c4696df9e3fb1890cc51cef77d29ac7cbeec81&lt;/a&gt;&lt;/p&gt;</comment>
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