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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-55385] Remove dedicated thread pools for each ReshardingOplogApplier</title>
                <link>https://jira.mongodb.org/browse/SERVER-55385</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Each ReshardingOplogApplier instance (one per donor shard) currently receives &lt;a href=&quot;https://github.com/mongodb/mongo/blob/388ce132e9edd64cbfdf677a87ac5044ca3a79ed/src/mongo/db/s/resharding/resharding_recipient_service.cpp#L592-L595&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;its own ThreadPool&lt;/a&gt; for actually performing oplog application. Sizing the number of threads to use for resharding would be simpler for end users if there was only one of them, i.e. RecipientStateMachine&apos;s task executor.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1654771">SERVER-55385</key>
            <summary>Remove dedicated thread pools for each ReshardingOplogApplier</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="max.hirschhorn@mongodb.com">Max Hirschhorn</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                    </labels>
                <created>Sat, 20 Mar 2021 17:07:12 +0000</created>
                <updated>Sun, 29 Oct 2023 21:55:58 +0000</updated>
                            <resolved>Fri, 9 Apr 2021 11:43:41 +0000</resolved>
                                                    <fixVersion>5.0.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3709340" author="xgen-internal-githook" created="Fri, 9 Apr 2021 02:52:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Max Hirschhorn&apos;, &apos;email&apos;: &apos;max.hirschhorn@mongodb.com&apos;, &apos;username&apos;: &apos;visemet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55385&quot; title=&quot;Remove dedicated thread pools for each ReshardingOplogApplier&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55385&quot;&gt;&lt;del&gt;SERVER-55385&lt;/del&gt;&lt;/a&gt; Use common executor to apply oplog entries in resharding.&lt;/p&gt;

&lt;p&gt;Removes the dedicated thread pools for each ReshardingOplogApplier to&lt;br/&gt;
apply oplog entries with.&lt;/p&gt;

&lt;p&gt;Renames the reshardingWriterThreadCount server parameter to be called&lt;br/&gt;
reshardingOplogBatchTaskCount.&lt;/p&gt;

&lt;p&gt;Adds a ReshardingOplogBatchApplier class to apply batches of oplog&lt;br/&gt;
entries without blocking the thread on prepared transactions during&lt;br/&gt;
session application.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cd5acd79d124fdb2552c411963eb7c29019ffc26&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cd5acd79d124fdb2552c411963eb7c29019ffc26&lt;/a&gt;&lt;/p&gt;</comment>
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                <issuelinks>
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                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="1654770">SERVER-55384</issuekey>
        </issuelink>
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                            <issuelinktype id="10010">
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            <issuekey id="1555325">SERVER-53139</issuekey>
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