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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-82358] Reduce the synchronization cost of `LockedClientsCursor`</title>
                <link>https://jira.mongodb.org/browse/SERVER-82358</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This primary targets &lt;tt&gt;serverStatus&lt;/tt&gt;, and more specifically the &lt;tt&gt;FTDC&lt;/tt&gt; thread running this command to collect metrics on active operations. Today, every invocation of &lt;tt&gt;serverStatus&lt;/tt&gt; needs to exclusively lock the &lt;tt&gt;ServiceContext&lt;/tt&gt;, and then iterate through the list of &lt;tt&gt;Client&lt;/tt&gt; objects, individually lock them (using a spin-lock), and check their associated &lt;tt&gt;OperationContext&lt;/tt&gt;. Under heavy-load, and if either of these locks is contended, this may result in stalls in collecting metrics.&lt;/p&gt;

&lt;p&gt;The idea is to either bound the time spent waiting to acquire the &lt;tt&gt;ServiceContext&lt;/tt&gt; mutex, or redesign the synchronization primitive (e.g. partition it) to make it more scalable / less susceptible to contentions during operation spikes.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2480364">SERVER-82358</key>
            <summary>Reduce the synchronization cost of `LockedClientsCursor`</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="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</reporter>
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                <created>Fri, 20 Oct 2023 21:00:28 +0000</created>
                <updated>Wed, 24 Jan 2024 00:01:12 +0000</updated>
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