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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-47828] Do not copy replica set config when accessing it</title>
                <link>https://jira.mongodb.org/browse/SERVER-47828</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;ReplicationCoordinatorImpl::getConfig()&lt;/tt&gt; copies the whole config which can be a subtle performance trap as we have seen in&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40250&quot; title=&quot;High contention for ReplicationCoordinatorImpl::_mutex in w:majority workloads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40250&quot;&gt;&lt;del&gt;SERVER-40250&lt;/del&gt;&lt;/a&gt;. It&apos;s an issue in&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46186&quot; title=&quot;Single voter replica set primaries must wait for the truncate point for {j:true} write concern&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46186&quot;&gt;&lt;del&gt;SERVER-46186&lt;/del&gt;&lt;/a&gt;&apos;s patch as well.&lt;/p&gt;

&lt;p&gt;We can either return a const reference or expose a way to call member functions on the config without copying it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1332191">SERVER-47828</key>
            <summary>Do not copy replica set config when accessing it</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="carolyn.duan@mongodb.com">Carolyn Duan</assignee>
                                    <reporter username="siyuan.zhou@mongodb.com">Siyuan Zhou</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Tue, 28 Apr 2020 23:11:04 +0000</created>
                <updated>Sun, 29 Oct 2023 22:08:55 +0000</updated>
                            <resolved>Tue, 22 Jun 2021 20:38:36 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="4108282" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 19:02:31 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3892291" author="xgen-internal-githook" created="Tue, 22 Jun 2021 18:46:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Carolyn Duan&apos;, &apos;email&apos;: &apos;carolyn.duan@mongodb.com&apos;, &apos;username&apos;: &apos;duancaro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47828&quot; title=&quot;Do not copy replica set config when accessing it&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47828&quot;&gt;&lt;del&gt;SERVER-47828&lt;/del&gt;&lt;/a&gt; Add getConfig* methods to avoid copying ReplSetConfig&lt;br/&gt;
through ReplicationCoordinatorImpl::getConfig()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e866ed8e645c034d773bc9de6dd4ec13ee769bea&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e866ed8e645c034d773bc9de6dd4ec13ee769bea&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3059722" author="siyuan.zhou@10gen.com" created="Tue, 28 Apr 2020 23:12:21 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ldeng&quot; class=&quot;user-hover&quot; rel=&quot;ldeng&quot;&gt;ldeng&lt;/a&gt;, how much perf drop was in&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40250&quot; title=&quot;High contention for ReplicationCoordinatorImpl::_mutex in w:majority workloads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40250&quot;&gt;&lt;del&gt;SERVER-40250&lt;/del&gt;&lt;/a&gt;?&lt;/p&gt;</comment>
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