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    <title>MongoDB Jira</title>
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    <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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            <title>[DOCS-16280] Investigate changes in SERVER-57297: Support OP_MSG exhaust cursors on mongos</title>
                <link>https://jira.mongodb.org/browse/DOCS-16280</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;    mongos supports exhaust cursors. This change implements exhaust cursors for mongos when a client&apos;s getMore request has exhaustAllowed flag set.&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;    &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36105&quot; title=&quot;Implement server support for exhaust cursors in OP_MSG&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36105&quot;&gt;&lt;del&gt;SERVER-36105&lt;/del&gt;&lt;/a&gt; added support for OP_MSG exhaust cursors for both mongod and mongos in 4.2. Later in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44517&quot; title=&quot;Refactor exhaust cursors on top of exhaust isMaster code changes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44517&quot;&gt;&lt;del&gt;SERVER-44517&lt;/del&gt;&lt;/a&gt; support for exhaust on mongos was removed in 4.4 (for the good reason that the mongos code path was untested). This ticket request that OP_MSG exhaust cursors be officially supported on mongos.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DRIVERS-535&quot; title=&quot;Support Exhaust Cursor in OP_MSG&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DRIVERS-535&quot;&gt;&lt;del&gt;DRIVERS-535&lt;/del&gt;&lt;/a&gt; depends on this feature since we don&apos;t want to add a feature to drivers which doesn&apos;t work in sharded clusters. The motivation is that&#160;exhaust cursors can provide better query performance.&lt;/p&gt;

&lt;p&gt;Another potential improvement is for Load Balanced clusters. When the driver is connected through a load balancer it automatically pins the connection to the cursor. Since the connection is already pinned, it would be possible to automatically use exhaust cursors to (potentially) improve performance.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2403181">DOCS-16280</key>
            <summary>Investigate changes in SERVER-57297: Support OP_MSG exhaust cursors on mongos</summary>
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                                            <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="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>query</label>
                            <label>sharding</label>
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                <created>Thu, 27 Jul 2023 19:39:29 +0000</created>
                <updated>Mon, 13 Nov 2023 18:43:42 +0000</updated>
                            <resolved>Wed, 11 Oct 2023 19:02:49 +0000</resolved>
                                                    <fixVersion>7.1.0-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>
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                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
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