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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-83174] AutoStatsTracker contract is unclear</title>
                <link>https://jira.mongodb.org/browse/SERVER-83174</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There is no concrete contract outlining the responsibilities of the AutoStatsTracker and its resulting metrics.&lt;/p&gt;

&lt;p&gt;It&apos;s &lt;a href=&quot;https://github.com/mongodb/mongo/blob/463395b4aafd5c0e85a1dbcc28b5c5b275469886/src/mongo/db/db_raii.h#L61-L66&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;intended to be&lt;/a&gt; an RAII class to update diagnostic state on CurOp and report Top upon destruction.&lt;/p&gt;

&lt;p&gt;Today, the AutoStatsTracker (1) ensures metric reporting has begun for curOp (2) changes the databaseProfiling level and updates the _nss on curOp (3) updates the Top() command metrics on destruction.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Ambiguities&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;It &lt;a href=&quot;https://github.com/mongodb/mongo/blob/463395b4aafd5c0e85a1dbcc28b5c5b275469886/src/mongo/db/db_raii.cpp#L310&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;implicitly ensures active metrics recording on curOp ,&lt;/a&gt; but doesn&apos;t guarantee when metrics recording will end / know if it has already started for curOp().&lt;/p&gt;

&lt;p&gt;It reports metrics to Top() upon destruction, but there is no guarantee when the metrics started recording - is the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/4761d14b3921be3fcd3c205d6f22fafa07c76527/src/mongo/db/db_raii.cpp#L355&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;time elapsed&lt;/a&gt; tracked by curOp representative of the scope of the AutoStatsTracker?&lt;/p&gt;

&lt;p&gt;Additionally, its unclear when the AutoStatsTracker should be used and at what level in the code - when does an operation &apos;start&apos; and and &apos;end&apos;, and what stats are of interest at what points in an operations trajectory.&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2498335">SERVER-83174</key>
            <summary>AutoStatsTracker contract is unclear</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="haley.connelly@mongodb.com">Haley Connelly</reporter>
                        <labels>
                    </labels>
                <created>Mon, 13 Nov 2023 15:54:11 +0000</created>
                <updated>Tue, 26 Dec 2023 16:25:16 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>6</watches>
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