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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-5271] Add keysExamined, docsExamined, and nReturned counters to $currentOp</title>
                <link>https://jira.mongodb.org/browse/SERVER-5271</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It would be useful to see how far large ops have gotten. M/Rs give some sense of progress. It could be useful in some cases to have nscanned info on queries. Not sure how hard that is to get, though.&lt;/p&gt;</description>
                <environment></environment>
        <key id="32618">SERVER-5271</key>
            <summary>Add keysExamined, docsExamined, and nReturned counters to $currentOp</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="jared">Jared D. Cottrell</reporter>
                        <labels>
                            <label>currentOp</label>
                    </labels>
                <created>Fri, 9 Mar 2012 17:26:02 +0000</created>
                <updated>Tue, 6 Dec 2022 05:35:06 +0000</updated>
                                            <version>2.0.3</version>
                                                    <component>Diagnostics</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2229060" author="david.storch" created="Tue, 30 Apr 2019 13:55:43 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=james.wahlin&quot; class=&quot;user-hover&quot; rel=&quot;james.wahlin&quot;&gt;james.wahlin&lt;/a&gt; if I understand correctly, this ticket tracks the work to add the &lt;tt&gt;keysExamined&lt;/tt&gt;, &lt;tt&gt;docsExamined&lt;/tt&gt;, and &lt;tt&gt;nReturned&lt;/tt&gt; metrics to &lt;tt&gt;$currentOp&lt;/tt&gt;, specifically so the progress of long-running operations is visible as they execute. Currently, these metrics are only written to the diagnostic log and to &lt;tt&gt;system.profile&lt;/tt&gt; after the operation completes.&lt;/p&gt;</comment>
                            <comment id="2128048" author="james.wahlin@10gen.com" created="Fri, 25 Jan 2019 20:13:11 +0000"  >&lt;p&gt;I believe this ticket can be closed as we report keysExamined and docsExamined for the mapReduce command. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/9b28edefa6d92d9b2d2bf0dbcf55dc38766b016a/jstests/core/profile_mapreduce.js#L43-L44&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This test&lt;/a&gt; confirms this behavior.&lt;/p&gt;</comment>
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            <issuekey id="273971">SERVER-23257</issuekey>
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