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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>[DOCS-13066] Investigate changes in SERVER-7694: external sort for find command</title>
                <link>https://jira.mongodb.org/browse/DOCS-13066</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&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;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;See public comment left immediately after the link to the git commit.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;

&lt;p&gt;Right now when query results must be sorted before being returned, a top-N sort is performed in memory with a memory footprint cap enforced. The goal for this ticket is move to external sorting if too much memory is required, see discussion in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4716&quot; title=&quot;reexamine scan and order memory limit handling&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4716&quot;&gt;&lt;del&gt;SERVER-4716&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;
&lt;ul&gt;
	&lt;li&gt;Document &lt;tt&gt;allowDiskUse&lt;/tt&gt; parameter for &lt;tt&gt;find&lt;/tt&gt; database command&lt;/li&gt;
	&lt;li&gt;Document &lt;tt&gt;allowDiskUse()&lt;/tt&gt; cursor method for &lt;tt&gt;db.collection.find()&lt;/tt&gt;&lt;/li&gt;
	&lt;li&gt;Document increase&#160;&lt;a href=&quot;https://docs.mongodb.com/manual/reference/limits/#Sort-Operations&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;non-index sort memory cap&lt;/a&gt; (32MB -&amp;gt; 100MB)&lt;/li&gt;
&lt;/ul&gt;


&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;
&lt;ul&gt;
	&lt;li&gt;Drivers may need to either link to &lt;tt&gt;allowDiskUse&lt;/tt&gt; or update their docs to reference support for the new option&lt;/li&gt;
	&lt;li&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;
&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;</description>
                <environment></environment>
        <key id="948103">DOCS-13066</key>
            <summary>Investigate changes in SERVER-7694: external sort for find command</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="ravind.kumar">Ravind Kumar</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Wed, 2 Oct 2019 00:42:16 +0000</created>
                <updated>Mon, 13 Nov 2023 18:15:39 +0000</updated>
                            <resolved>Fri, 7 Feb 2020 19:57:02 +0000</resolved>
                                                    <fixVersion>4.3.1</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>4</watches>
                                                                                                                <comments>
                            <comment id="2841582" author="xgen-internal-githook" created="Fri, 7 Feb 2020 19:56:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;rkumar-mongo&apos;, &apos;name&apos;: &apos;Ravind Kumar&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13066&quot; title=&quot;Investigate changes in SERVER-7694: external sort for find command&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13066&quot;&gt;&lt;del&gt;DOCS-13066&lt;/del&gt;&lt;/a&gt;: &lt;span class=&quot;error&quot;&gt;&amp;#91;4.4&amp;#93;&lt;/span&gt; allowDiskUse support for find&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/5e9eeb31bf04b328c3022ef4e922b9804fd47f4b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/5e9eeb31bf04b328c3022ef4e922b9804fd47f4b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2769587" author="ravind.kumar" created="Tue, 28 Jan 2020 23:17:47 +0000"  >&lt;p&gt;&lt;a href=&quot;https://mongodbcr.appspot.com/527780024/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;code-review&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2769044" author="behackett" created="Tue, 28 Jan 2020 19:53:23 +0000"  >&lt;p&gt;We already have &lt;a href=&quot;https://jira.mongodb.org/browse/DRIVERS-690&quot; title=&quot;Support for allowDiskUse on find operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DRIVERS-690&quot;&gt;&lt;del&gt;DRIVERS-690&lt;/del&gt;&lt;/a&gt; tracking the work to expose allowDiskUse in find(). &lt;/p&gt;</comment>
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            <issuekey id="56753">SERVER-7694</issuekey>
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            <issuelink>
            <issuekey id="834934">SERVER-42077</issuekey>
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            <issuekey id="854334">SERVER-42179</issuekey>
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