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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-36533] Report execution stats for $exchange in sharded aggregation explains</title>
                <link>https://jira.mongodb.org/browse/SERVER-36533</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, only the $cursor stage reports any interesting execution statistics when explaning an aggregation at verbosity level &quot;executionStats&quot;. Because of the complexity of $exchange, it would be interesting to expose more runtime stats.&lt;/p&gt;

&lt;p&gt;Some ideas of what might be interesting off the top of my head:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;number of total calls to DocumentSourceExchange::getNext()&lt;/li&gt;
	&lt;li&gt;number of total yields&lt;/li&gt;
	&lt;li&gt;number of times each consumer blocks on empty buffer&lt;/li&gt;
	&lt;li&gt;number of times each consumer thread fills the buffers&lt;/li&gt;
	&lt;li&gt;the number of times buffer N is filled to capacity&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="585617">SERVER-36533</key>
            <summary>Report execution stats for $exchange in sharded aggregation explains</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="kyle.suarez@mongodb.com">Kyle Suarez</reporter>
                        <labels>
                    </labels>
                <created>Wed, 8 Aug 2018 19:13:38 +0000</created>
                <updated>Tue, 6 Dec 2022 03:21:49 +0000</updated>
                                                                            <component>Aggregation Framework</component>
                    <component>Diagnostics</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
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