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    <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-15692] Restore serverStatus.indexCounters section when running with MMAPv1 storage engine</title>
                <link>https://jira.mongodb.org/browse/SERVER-15692</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Commit &lt;a href=&quot;https://github.com/mongodb/mongo/commit/712e4f8063a0e329fd6d69d80d992e2214f97d6e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;712e4f8063a0e3&lt;/a&gt; removed src/mongo/db/structure/btree/btree_stats.{h,cpp}. These files contained the implementation of the IndexCounters class, which was responsible for generating the &lt;a href=&quot;http://docs.mongodb.org/manual/reference/command/serverStatus/#server-status-indexcounters&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&quot;indexCounters&quot; section of serverStatus&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;The implementation used Record::likelyInPhysicalMemory(), which has also been removed, to keep track of the number of the number of times in in-memory index record was used (&quot;hits&quot;) as well as the number of times an index record had to be fetched from secondary storage (&quot;misses&quot;).&lt;/p&gt;

&lt;p&gt;We should consider restoring this functionality in some form.&lt;/p&gt;</description>
                <environment></environment>
        <key id="164038">SERVER-15692</key>
            <summary>Restore serverStatus.indexCounters section when running with MMAPv1 storage engine</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="3">Duplicate</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Thu, 16 Oct 2014 18:49:20 +0000</created>
                <updated>Fri, 20 Mar 2015 17:48:03 +0000</updated>
                            <resolved>Thu, 11 Dec 2014 21:08:04 +0000</resolved>
                                                                    <component>Index Maintenance</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="784225" author="david.storch" created="Thu, 11 Dec 2014 21:07:48 +0000"  >&lt;p&gt;Closing as a duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16378&quot; title=&quot;serverStatus &amp;quot;indexCounters&amp;quot;, &amp;quot;recordStats&amp;quot;, and &amp;quot;workingSet&amp;quot; sections missing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16378&quot;&gt;&lt;del&gt;SERVER-16378&lt;/del&gt;&lt;/a&gt;. This ticket covers three MMAPv1-specific serverStatus sections that were removed in 2.7 development versions: &quot;indexCounters&quot;, &quot;recordStats&quot;, and &quot;workingSet&quot;.&lt;/p&gt;</comment>
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