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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-78960] Investigate if CounterMetric can do increment using fetchAndAddRelaxed for better performance</title>
                <link>https://jira.mongodb.org/browse/SERVER-78960</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We record a lot of metrics in serverStatus that are of type CounterMetric. The increment() function of CounterMetric uses atomic &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e2afe5a386fd775500504d7802e54c1aba5223c8/src/mongo/platform/atomic_word.h#L160&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;fetch_add()&lt;/a&gt; which by default uses memory order &lt;a href=&quot;https://en.cppreference.com/w/cpp/atomic/atomic/fetch_add&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;std::memory_order_seq_cst&lt;/a&gt; that is expensive since it needs to synchronize cpu cores with memory fences. Since they are for metrics, it seems we can use &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e2afe5a386fd775500504d7802e54c1aba5223c8/src/mongo/platform/atomic_word.h#L163-L169&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;fetchAndAddRelaxed&lt;/a&gt; instead which uses a relaxed memory ordering, to reduce the synchronization overheads.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2391479">SERVER-78960</key>
            <summary>Investigate if CounterMetric can do increment using fetchAndAddRelaxed for better performance</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>
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                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="wenbin.zhu@mongodb.com">Wenbin Zhu</reporter>
                        <labels>
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                <created>Thu, 13 Jul 2023 21:52:18 +0000</created>
                <updated>Fri, 14 Jul 2023 05:54:14 +0000</updated>
                            <resolved>Fri, 14 Jul 2023 05:53:29 +0000</resolved>
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