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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-54089] Improve SBE perf for bestbuy_agg_merge_wordcount::all_word_count_no_merge</title>
                <link>https://jira.mongodb.org/browse/SERVER-54089</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When SBE is enabled, the aggregate() command from the all_word_count_no_merge benchmark (from the&#160;bestbuy_agg_merge_wordcount suite) is noticeably slower vs. the classic execution engine.&lt;/p&gt;

&lt;p&gt;At the time of this writing, on my local machine this benchmark takes 22243ms when SBE is enabled, compared with 11873ms for the classic execution engine (i.e. SBE disabled).&lt;/p&gt;

&lt;p&gt;Instructions on how to run the aggregate() command:&lt;/p&gt;

&lt;p&gt;1) Download the bestbuy dataset.&lt;/p&gt;

&lt;p&gt;2) Start mongod. If you want to enabled SBE, pass &apos;--setParameter &quot;featureFlagSBE=true&quot;&apos; on the command line.&lt;/p&gt;

&lt;p&gt;3) Load the bestbuy dataset using the following command:&#160;&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongorestore --gzip --archive=bestbuyproducts.bson.gz&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;4) Launch the mongo shell and run the following commands to prepare your environment:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; function millis(command) { const t1 = new Date(); const result = command(); const t2 = new Date(); print(&quot;time: &quot; + (t2 - t1) + &quot;ms&quot;); return (t2-t1); }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; use bestbuy&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;&#160;5) Run the following command multiple times to measure the performance of the aggregate() command:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; millis(() =&amp;gt; db.products.aggregate([{&quot;$project&quot;:{&quot;wordOfDesc&quot;:{&quot;$split&quot;:[&quot;$longDescription&quot;,&quot; &quot;]}}},{&quot;$unwind&quot;:&quot;$wordOfDesc&quot;},{&quot;$group&quot;:{&quot;_id&quot;:&quot;$wordOfDesc&quot;,&quot;count&quot;:{&quot;$sum&quot;:1.0}}}]).itcount())&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;Note that step #5 above will print out the amount of time the entire &quot;aggregate(..).itcount()&quot; shell command takes from the client&apos;s perspective. If you are interested in how long each individual mongo command takes on the server, consider using the slow query timer.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1602793">SERVER-54089</key>
            <summary>Improve SBE perf for bestbuy_agg_merge_wordcount::all_word_count_no_merge</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="3">Duplicate</resolution>
                                        <assignee username="andrew.paroski@mongodb.com">Drew Paroski</assignee>
                                    <reporter username="andrew.paroski@mongodb.com">Drew Paroski</reporter>
                        <labels>
                            <label>qexec-team</label>
                    </labels>
                <created>Thu, 28 Jan 2021 00:19:10 +0000</created>
                <updated>Tue, 9 Feb 2021 16:01:24 +0000</updated>
                            <resolved>Thu, 4 Feb 2021 20:52:09 +0000</resolved>
                                                                    <component>Querying</component>
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                                        <issuelink>
            <issuekey id="1602415">SERVER-54078</issuekey>
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