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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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            <title>[SERVER-79805] Explain command does not report executionStats on mongos</title>
                <link>https://jira.mongodb.org/browse/SERVER-79805</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I&apos;ve noticed that for sharded collections, we report &lt;tt&gt;executionStats&lt;/tt&gt; under the &lt;tt&gt;shards&lt;/tt&gt; field for each sub-pipeline that gets executed on the individual shards. But we don&apos;t have any information about what is happening on mongos during the &lt;tt&gt;$mergeCursors&lt;/tt&gt; or the stages after the &lt;tt&gt;$mergeCursors&lt;/tt&gt;. For example, a &lt;tt&gt;$group&lt;/tt&gt; or a &lt;tt&gt;$sort&lt;/tt&gt; could spend a significant amount of time after the &lt;tt&gt;$mergeCursors&lt;/tt&gt; and we provide no information about that in the explain. There could also be a network latency between the mongos and mongod communication that would be easy to identify if we report &lt;tt&gt;executionStats&lt;/tt&gt; on mongos.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2411044">SERVER-79805</key>
            <summary>Explain command does not report executionStats on mongos</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="arun.banala@mongodb.com">Arun Banala</reporter>
                        <labels>
                            <label>query-product-scope-2</label>
                            <label>query-product-urgency-3</label>
                            <label>query-product-value-3</label>
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                <created>Mon, 7 Aug 2023 19:08:12 +0000</created>
                <updated>Thu, 17 Aug 2023 20:40:08 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5641590" author="JIRAUSER1265607" created="Thu, 17 Aug 2023 20:40:01 +0000"  >&lt;p&gt;product triage: We haven&apos;t heard any customer asking for this. And since we are introducing a new explain for CQF, we&apos;d defer this effort to future improvements. Sending it to backlog.&#160;&lt;/p&gt;</comment>
                            <comment id="5632201" author="JIRAUSER1257467" created="Mon, 14 Aug 2023 14:14:41 +0000"  >&lt;p&gt;Passing to product to decide on priority&lt;/p&gt;</comment>
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