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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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<item>
            <title>[DOCS-15697] Investigate changes in SERVER-53657: $group&apos;s executionStats should report the spilled data file size</title>
                <link>https://jira.mongodb.org/browse/DOCS-15697</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Original Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;    This commit introduces two fields to the execution stats explain output of $group in the classic engine: &lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;spillFileSizeBytes, which reports the size of the spill file written to disk&lt;/li&gt;
	&lt;li&gt;numBytesSpilledEstimate, which reports an estimate of the size of $group data evicted from memory as part of spilling&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Note that these are not the same quantity, typically, spillFileSizeBytes will be less than numBytesSpilledEstimate because the buffer will be compressed before being written to disk.&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    $group&apos;s executionStats should expose a stats &quot;&lt;b&gt;spillFileSizeBytes&lt;/b&gt;&quot;. This stat should report the maximum files size bytes that was written to disk in bytes. This stat will help in better planning/recommendation on disk usage and maybe I/O capacity planning.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2163368">DOCS-15697</key>
            <summary>Investigate changes in SERVER-53657: $group&apos;s executionStats should report the spilled data file size</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="13201">Fixed</resolution>
                                        <assignee username="alison.huh@mongodb.com">Alison Huh</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                            <label>ready-for-work</label>
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                <created>Thu, 20 Oct 2022 15:49:40 +0000</created>
                <updated>Mon, 13 Nov 2023 17:37:49 +0000</updated>
                            <resolved>Mon, 6 Feb 2023 20:47:56 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                    <fixVersion>6.3.0-rc0</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5032844" author="edu.bot" created="Tue, 6 Dec 2022 11:37:30 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53657&quot; title=&quot;$group&amp;#39;s executionStats should report the spilled data file size&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53657&quot;&gt;&lt;del&gt;SERVER-53657&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;br/&gt;
6.3.0-rc0&lt;/p&gt;</comment>
                            <comment id="4968016" author="JIRAUSER1260455" created="Wed, 9 Nov 2022 18:28:42 +0000"  >&lt;p&gt;Engineering reverted merge due to Evergreen test failure. There is no timeline for when work will pick up yet.&lt;/p&gt;</comment>
                            <comment id="4917519" author="edu.bot" created="Fri, 21 Oct 2022 02:16:06 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53657&quot; title=&quot;$group&amp;#39;s executionStats should report the spilled data file size&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53657&quot;&gt;&lt;del&gt;SERVER-53657&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;/p&gt;</comment>
                            <comment id="4916085" author="edu.bot" created="Thu, 20 Oct 2022 15:49:48 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53657&quot; title=&quot;$group&amp;#39;s executionStats should report the spilled data file size&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53657&quot;&gt;&lt;del&gt;SERVER-53657&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;br/&gt;
6.2.0-rc0&lt;/p&gt;</comment>
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                            <customfieldvalue>This commit introduces two fields to the execution stats explain output of $group in the classic engine: &lt;br/&gt;
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