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    <title>MongoDB Jira</title>
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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-4341] update/correct documentation for _secondaryThrottle</title>
                <link>https://jira.mongodb.org/browse/DOCS-4341</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;&lt;a href=&quot;http://docs.mongodb.org/v2.4/tutorial/configure-sharded-cluster-balancer/#require-replication-before-chunk-migration-secondary-throttle&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/v2.4/tutorial/configure-sharded-cluster-balancer/#require-replication-before-chunk-migration-secondary-throttle&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The title of the linked section is incorrect:&lt;br/&gt;
 &quot;Require Replication before Chunk Migration (Secondary Throttle)&quot;&lt;/p&gt;

&lt;p&gt;Regardless of the setting of &lt;tt&gt;&amp;#95;secondaryThrottle&lt;/tt&gt; a &lt;tt&gt;chunkMove&lt;/tt&gt; &lt;b&gt;will&lt;/b&gt; wait for replication (if it is too far behind) before initiating migration. This behavior is hard-coded.&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;&amp;#95;secondaryThrottle&lt;/tt&gt; only takes effect &lt;em&gt;during&lt;/em&gt; chunk migration and refers to the commitment stage of the move (i.e whether or not the source documents are deleted from the originating shard before or after a secondary has confirmed replication).&lt;/p&gt;

&lt;p&gt;Interestingly, the body text on that page is stated correctly, albeit somewhat subtly.&lt;/p&gt;

&lt;p&gt;I think it is worth calling out this difference in wording. Explicitly stating that &lt;tt&gt;&amp;#95;secondaryThrottle&lt;/tt&gt; only applies &lt;em&gt;during&lt;/em&gt; a chunk migration and that the chunk move will not be started (regardless) until secondaries are within 10 hours (also hard-coded) of being up-to-date.&lt;/p&gt;</description>
                <environment></environment>
        <key id="168459">DOCS-4341</key>
            <summary>update/correct documentation for _secondaryThrottle</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="9">Done</resolution>
                                        <assignee username="sam.kleinman">Sam Kleinman</assignee>
                                    <reporter username="andrew.ryder@mongodb.com">Andrew Ryder</reporter>
                        <labels>
                    </labels>
                <created>Tue, 11 Nov 2014 05:35:19 +0000</created>
                <updated>Mon, 16 Mar 2015 23:52:13 +0000</updated>
                            <resolved>Fri, 5 Dec 2014 18:03:28 +0000</resolved>
                                                    <fixVersion>v1.3.15</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="779672" author="xgen-internal-githook" created="Fri, 5 Dec 2014 18:03:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;tychoish&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4341&quot; title=&quot;update/correct documentation for _secondaryThrottle&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4341&quot;&gt;&lt;del&gt;DOCS-4341&lt;/del&gt;&lt;/a&gt;: correction to secondaryThrottle&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/3b33ff53c82010590b28eb59629b867728eb4711&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/3b33ff53c82010590b28eb59629b867728eb4711&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="67131">DOCS-1189</issuekey>
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