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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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<item>
            <title>[SERVER-38939] Be more memory efficient for leaf nodes in biggie</title>
                <link>https://jira.mongodb.org/browse/SERVER-38939</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently each node in the tree, including leaf pointers, has 256 shared pointers. Each  shared pointer is 16 bytes, for a total of 4kB for the pointers. As the first allocation size &amp;gt; 4kB is 6 kB, and each document results in 2 nodes (one for index, one for record store), each document has 12kB overhead (18 kB for replicasets due to the oplog).&lt;br/&gt;
This causes each Node to be &amp;gt; 4kB resulting in excessive memory usage during testing and OOMs. &lt;br/&gt;
Change the Node representation to avoid shared pointers in leaf nodes.&lt;/p&gt;</description>
                <environment></environment>
        <key id="669789">SERVER-38939</key>
            <summary>Be more memory efficient for leaf nodes in biggie</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="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="geert.bosch@mongodb.com">Geert Bosch</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Jan 2019 21:42:35 +0000</created>
                <updated>Tue, 6 Dec 2022 03:08:33 +0000</updated>
                            <resolved>Wed, 20 May 2020 03:19:25 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3089709" author="henrik.edin" created="Fri, 15 May 2020 13:57:06 +0000"  >&lt;p&gt;This should probably be closed in favor of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36709&quot; title=&quot;Make radix store nodes adaptive to improve memory efficiency&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36709&quot;&gt;&lt;del&gt;SERVER-36709&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2117517" author="xgen-internal-githook" created="Wed, 16 Jan 2019 20:31:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;GeertBosch&apos;, &apos;email&apos;: &apos;geert@mongodb.com&apos;, &apos;name&apos;: &apos;Geert Bosch&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38939&quot; title=&quot;Be more memory efficient for leaf nodes in biggie&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38939&quot;&gt;&lt;del&gt;SERVER-38939&lt;/del&gt;&lt;/a&gt; Be more memory efficient for leaf nodes in biggie&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 71b46ab799f870d1ddbf2d6d6e133b39724c945c.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fb29b8e9d5a11dd418751c57900e510cf104e9a7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fb29b8e9d5a11dd418751c57900e510cf104e9a7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2114746" author="xgen-internal-githook" created="Mon, 14 Jan 2019 20:51:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;GeertBosch&apos;, &apos;email&apos;: &apos;geert@mongodb.com&apos;, &apos;name&apos;: &apos;Geert Bosch&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38939&quot; title=&quot;Be more memory efficient for leaf nodes in biggie&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38939&quot;&gt;&lt;del&gt;SERVER-38939&lt;/del&gt;&lt;/a&gt; Be more memory efficient for leaf nodes in biggie&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/71b46ab799f870d1ddbf2d6d6e133b39724c945c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/71b46ab799f870d1ddbf2d6d6e133b39724c945c&lt;/a&gt;&lt;/p&gt;</comment>
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