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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-42466] use read_once cursor option during initial sync collection cloning</title>
                <link>https://jira.mongodb.org/browse/SERVER-42466</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;On &lt;a href=&quot;https://jira.mongodb.org/browse/WT-4090&quot; title=&quot;Low priority reads&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-4090&quot;&gt;&lt;del&gt;WT-4090&lt;/del&gt;&lt;/a&gt; the WiredTiger team implemented a read_once cursor option. This is useful when we know that we are going to read the data only once, helping to avoid populating the cache with data we don&apos;t need.&lt;/p&gt;

&lt;p&gt;This has been proved beneficial to reduce the index creation time (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37269&quot; title=&quot;Use read_once cursors to do foreground index build collection scans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37269&quot;&gt;&lt;del&gt;SERVER-37269&lt;/del&gt;&lt;/a&gt;), and I think that would be very useful when used by the collection clone process during the initial sync too.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Miguel&lt;/p&gt;</description>
                <environment></environment>
        <key id="878020">SERVER-42466</key>
            <summary>use read_once cursor option during initial sync collection cloning</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="kelsey.schubert@mongodb.com">Kelsey Schubert</assignee>
                                    <reporter username="miguel.nieto@mongodb.com">Miguel Angel Nieto</reporter>
                        <labels>
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                <created>Mon, 29 Jul 2019 07:56:40 +0000</created>
                <updated>Mon, 29 Jul 2019 20:52:40 +0000</updated>
                            <resolved>Mon, 29 Jul 2019 20:52:39 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2348648" author="miguel.nieto" created="Mon, 29 Jul 2019 19:03:52 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kelsey.schubert&quot; class=&quot;user-hover&quot; rel=&quot;kelsey.schubert&quot;&gt;kelsey.schubert&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Yes, duplicate. I couldn&apos;t find it &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;

&lt;p&gt;Thanks.&lt;/p&gt;</comment>
                            <comment id="2348239" author="thomas.schubert" created="Mon, 29 Jul 2019 15:53:24 +0000"  >&lt;p&gt;dup of&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36537&quot; title=&quot;Initial sync cursor should not keep data in cache&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36537&quot;&gt;&lt;del&gt;SERVER-36537&lt;/del&gt;&lt;/a&gt;?&lt;/p&gt;</comment>
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