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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-43357] FTDC ops writes not reflecting aggregation $out</title>
                <link>https://jira.mongodb.org/browse/SERVER-43357</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/attachment/230814/230814_ftdc.png&quot; width=&quot;100%&quot; style=&quot;border: 0px solid black&quot; /&gt;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;Is this intended behaviour?&lt;/p&gt;</description>
                <environment></environment>
        <key id="927400">SERVER-43357</key>
            <summary>FTDC ops writes not reflecting aggregation $out</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="13202">Works as Designed</resolution>
                                        <assignee username="ted.tuckman@mongodb.com">Ted Tuckman</assignee>
                                    <reporter username="josef.ahmad@mongodb.com">Josef Ahmad</reporter>
                        <labels>
                    </labels>
                <created>Sat, 14 Sep 2019 10:49:47 +0000</created>
                <updated>Fri, 27 Oct 2023 13:53:05 +0000</updated>
                            <resolved>Thu, 16 Jan 2020 14:08:32 +0000</resolved>
                                                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2710422" author="ted.tuckman" created="Tue, 7 Jan 2020 18:57:51 +0000"  >&lt;p&gt;So looking at what is happening here, it seems that the &quot;ss ops&quot; row in t2 is pulling data from the opLatencies document in serverStatus. That document is updated &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/service_entry_point_common.cpp#L1512&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; in the code, and so only gets updated for operations that enter the server through the service entry point. The opcounter is updated &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/ops/write_ops_exec.cpp#L422&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; and so works for all writes (in the insert case). With the names in serverStatus, this makes sense to me &amp;#8211; $out writes don&apos;t contribute to insert latencies as the requests are not coming over the network.&lt;/p&gt;

&lt;p&gt;Given this, my instinct is either to do nothing or change the name in t2 to reflect that that row comes from the opLatencies category. &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=asya&quot; class=&quot;user-hover&quot; rel=&quot;asya&quot;&gt;asya&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kateryna.kamenieva&quot; class=&quot;user-hover&quot; rel=&quot;kateryna.kamenieva&quot;&gt;kateryna.kamenieva&lt;/a&gt; does that seem reasonable? &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=josef.ahmad&quot; class=&quot;user-hover&quot; rel=&quot;josef.ahmad&quot;&gt;josef.ahmad&lt;/a&gt; would that clear up the confusion?&lt;/p&gt;</comment>
                    </comments>
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                            <attachment id="230814" name="ftdc.png" size="14236" author="josef.ahmad@mongodb.com" created="Sat, 14 Sep 2019 10:50:20 +0000"/>
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