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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-84854] Triage queries sourced from internal systems for evaluating SBE perf</title>
                <link>https://jira.mongodb.org/browse/SERVER-84854</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="1313454">SERVER-84854</key>
            <summary>Triage queries sourced from internal systems for evaluating SBE perf</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</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="9">Done</resolution>
                                        <assignee username="justin.seyster@mongodb.com">Justin Seyster</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Mon, 13 Apr 2020 19:16:07 +0000</created>
                <updated>Fri, 12 Jan 2024 02:51:53 +0000</updated>
                            <resolved>Mon, 13 Apr 2020 22:12:03 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3037846" author="justin.seyster" created="Mon, 13 Apr 2020 22:11:52 +0000"  >&lt;p&gt;Here are my notes for the queries linked from these sources:&lt;br/&gt;
&lt;a href=&quot;https://wiki.corp.mongodb.com/display/PRODUCT/Product+Analytics&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://wiki.corp.mongodb.com/display/PRODUCT/Product+Analytics&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://wiki.corp.mongodb.com/display/PRODUCT/Charts+as+samples+for+testing&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://wiki.corp.mongodb.com/display/PRODUCT/Charts+as+samples+for+testing&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The main conclusion is that there are few queries we could execute and benchmark from the compass-analytics-helpers.js file linked to in the &quot;Product Analytics&quot; wiki page.&lt;/p&gt;

&lt;p&gt;Most of these queries require features that our current SBE prototype does not support, but almost all of them are good candidates for benchmarking real-world scenarios once we are closer to a complete SBE implementation.&lt;/p&gt;

&lt;p&gt;In particular, many of these queries use the $group stage. If we wanted to extend the spike to get a more robust performance picture, we might consider implementing $group.&lt;/p&gt;

&lt;p&gt;Other common unsupported stages are $lookup, $unwind, and $facet.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Driver stats (Natalya Furmanova)&lt;/b&gt;&lt;br/&gt;
This query includes a $unwind stage, which we do not support. Martin is working on how to implement unwinding, but I&#8217;m not sure if he intends to write an end-to-end implementation of the stage that could be used to execute this query.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Distributed system analytics (Sheeri Cabral)&lt;/b&gt;&lt;br/&gt;
Almost all of the pipelines in this repository use $group. The few that don&#8217;t use $unwind or $facet.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Compass analytics (Massimiliano Marcon)&lt;/b&gt;&lt;br/&gt;
There are a few queries in compass-analytics-helpers.js that we could execute with our current prototype: compassTotalUsers, compassTotalUsersCommunity, compassEventOccurrenciesWithFilter, compassEventOccurrenciesTotal, hasThisCompassUserEverUsedAtlas, and compassFollowUser. All these queries have a pipeline that begins with a $match stage and then has a $count or $sort, meaning they can easily be rewritten as a supported find command.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Charts analytics (Tom Hollander)&lt;/b&gt;&lt;br/&gt;
All of these pipelines use $group.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;COVID-19 dashboard (by Thomas Rueckstiess)&lt;/b&gt;&lt;br/&gt;
All of these pipelines use $group and some use $lookup.&lt;/p&gt;</comment>
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