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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>[SERVER-36709] Make radix store nodes adaptive to improve memory efficiency</title>
                <link>https://jira.mongodb.org/browse/SERVER-36709</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 the index, one for record store), each document has 12kB overhead (18 kB for replica sets 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;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://db.in.tum.de/~leis/papers/ART.pdf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://db.in.tum.de/~leis/papers/ART.pdf&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="589607">SERVER-36709</key>
            <summary>Make radix store nodes adaptive to improve memory efficiency</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="yuhong.zhang@mongodb.com">Yuhong Zhang</assignee>
                                    <reporter username="audrey.fang">Audrey Fang</reporter>
                        <labels>
                            <label>intern_ephemeral_for_test</label>
                            <label>nyc</label>
                    </labels>
                <created>Thu, 16 Aug 2018 21:25:35 +0000</created>
                <updated>Sun, 29 Oct 2023 22:28:53 +0000</updated>
                            <resolved>Fri, 7 Aug 2020 18:10:10 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="3333232" author="xgen-internal-githook" created="Tue, 11 Aug 2020 17:15:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &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; Enable previously disabled tests due to excessive memory usage&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0dc74f5dc61a5a093ece56887083f8a934a45140&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0dc74f5dc61a5a093ece56887083f8a934a45140&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3328181" author="xgen-internal-githook" created="Fri, 7 Aug 2020 17:36:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;danielzhangyh@gmail.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &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; Make radix store nodes adaptive to improve memory efficiency&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d0fb0f3a888f2ce8923ab03fc5d88266af7d444e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d0fb0f3a888f2ce8923ab03fc5d88266af7d444e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3325983" author="xgen-internal-githook" created="Fri, 7 Aug 2020 07:07:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;, &apos;username&apos;: &apos;kaloianm&apos;}
&lt;p&gt;Message: Revert &quot;&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; Make Biggie store nodes adaptive to improve memory efficiency&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit bf95b1fabd4ee9b2154763f86eaa8f6c7ba3370c.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5ce374693fa02d05894f7119b39e11dd352b0d34&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5ce374693fa02d05894f7119b39e11dd352b0d34&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3325971" author="kaloian.manassiev" created="Fri, 7 Aug 2020 06:25:35 +0000"  >&lt;p&gt;The changes for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49553&quot; title=&quot;Allow point-in-time read transactions on ephemeralForTest to obtain the appropriate snapshot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49553&quot;&gt;&lt;del&gt;SERVER-49553&lt;/del&gt;&lt;/a&gt; and &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; break the Windows compile, so I am reverting them.&lt;/p&gt;</comment>
                            <comment id="3325846" author="xgen-internal-githook" created="Fri, 7 Aug 2020 01:14:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;danielzhangyh@gmail.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &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; Make Biggie store nodes adaptive to improve memory efficiency&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709debug&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;only 256&lt;/p&gt;

&lt;p&gt;server-36709 48&amp;amp;256&lt;/p&gt;

&lt;p&gt;server-36709 16-256 without shrink&lt;/p&gt;

&lt;p&gt;server-36709 16-256&lt;/p&gt;

&lt;p&gt;server-36709 4-256&lt;/p&gt;

&lt;p&gt;server-36709 0-256&lt;/p&gt;

&lt;p&gt;server-36709 cleanup&lt;/p&gt;

&lt;p&gt;server-36709&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bf95b1fabd4ee9b2154763f86eaa8f6c7ba3370c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bf95b1fabd4ee9b2154763f86eaa8f6c7ba3370c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3325845" author="xgen-internal-githook" created="Fri, 7 Aug 2020 01:14:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;danielzhangyh@gmail.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &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; Make Biggie store nodes adaptive to improve memory efficiency&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709debug&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;server-36709&lt;/p&gt;

&lt;p&gt;only 256&lt;/p&gt;

&lt;p&gt;server-36709 48&amp;amp;256&lt;/p&gt;

&lt;p&gt;server-36709 16-256 without shrink&lt;/p&gt;

&lt;p&gt;server-36709 16-256&lt;/p&gt;

&lt;p&gt;server-36709 4-256&lt;/p&gt;

&lt;p&gt;server-36709 0-256&lt;/p&gt;

&lt;p&gt;server-36709 cleanup&lt;/p&gt;

&lt;p&gt;server-36709&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bf95b1fabd4ee9b2154763f86eaa8f6c7ba3370c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bf95b1fabd4ee9b2154763f86eaa8f6c7ba3370c&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="669789">SERVER-38939</issuekey>
        </issuelink>
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                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1385937">SERVER-49008</issuekey>
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