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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-71400] Investigate using a shared mutex for ReplicationCoordinatorImpl</title>
                <link>https://jira.mongodb.org/browse/SERVER-71400</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During a PR discussion it was brought to light that users of ReplicationCoordinator are trying to work around methods that take the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2ac358301686205f5587ed314238a3c169e3c06e/src/mongo/db/repl/replication_coordinator_impl.h#L1669&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;_mutex&lt;/a&gt; lock on the belief that it is a heavily contended mutex.&lt;/p&gt;

&lt;p&gt;As most of the time the operations performed are read operations (all const methods for example) it could be of interest to explore the usage of a shared_mutex.&lt;/p&gt;

&lt;p&gt;The only problem this could cause is with write-starvation. An option to tackle this is to set a preference on Linux via &lt;a href=&quot;https://man7.org/linux/man-pages/man3/pthread_rwlockattr_setkind_np.3.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;pthread_rwlockattr_setkind_np&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2187499">SERVER-71400</key>
            <summary>Investigate using a shared mutex for ReplicationCoordinatorImpl</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="jordi.olivares-provencio@mongodb.com">Jordi Olivares Provencio</reporter>
                        <labels>
                    </labels>
                <created>Wed, 16 Nov 2022 11:53:40 +0000</created>
                <updated>Mon, 5 Dec 2022 20:11:13 +0000</updated>
                            <resolved>Mon, 28 Nov 2022 19:14:03 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>9</watches>
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