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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-13235] Investigate changes in SERVER-44282: Set NUMAPolicy in systemd unit</title>
                <link>https://jira.mongodb.org/browse/DOCS-13235</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;We need to create some documentation that explains how to properly modify our SystemD service file to include numactl for systems using NUMA. The original SysV init scripts used to do this but very few customers, if any, are still using those as most Linux distros have phased that out in favor of SystemD.&lt;/p&gt;

&lt;p&gt;The steps required are as follows:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;copy /lib/systemd/system/mongod.service to /etc/systemd/system/mongod.service&lt;/li&gt;
	&lt;li&gt;modify /etc/systemd/system/mongod.service such that the line &quot;ExecStart=/usr/bin/mongod --config /etc/mongod.conf&quot; is now &quot;ExecStart=/usr/bin/numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf&quot;&lt;/li&gt;
	&lt;li&gt;run `systemctl stop mongod`&lt;/li&gt;
	&lt;li&gt;run `systemctl daemon-reload`&lt;/li&gt;
	&lt;li&gt;run `systemctl start mongod`&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I&apos;m not sure if the path to numactl is exactly correct (/usr/bin/numactl) or what the normal path for it is. That&apos;s just an educated guess as I don&apos;t have access to a NUMA enabled system.&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;The legacy init scripts for mongod set the memory policy to interleave &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3574&quot; title=&quot;add numactl to init scripts &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3574&quot;&gt;&lt;del&gt;SERVER-3574&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
 However the systemd units do not.&lt;/p&gt;

&lt;p&gt;New versions of systemd support the &lt;tt&gt;NUMAPolicy=interleave&lt;/tt&gt; directive. &lt;a href=&quot;https://www.freedesktop.org/software/systemd/man/systemd.exec.html#NUMAPolicy=&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.freedesktop.org/software/systemd/man/systemd.exec.html#NUMAPolicy=&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Adding this configuration would minimize the differences between the init scripts and systemd unit files.&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;
&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&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="1015982">DOCS-13235</key>
            <summary>Investigate changes in SERVER-44282: Set NUMAPolicy in systemd unit</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="andrew.feierabend@mongodb.com">Andrew Feierabend</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                            <label>docs-administration</label>
                    </labels>
                <created>Wed, 20 Nov 2019 18:05:57 +0000</created>
                <updated>Mon, 30 Oct 2023 20:31:27 +0000</updated>
                            <resolved>Mon, 3 Feb 2020 22:31:39 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2867628" author="xgen-internal-githook" created="Tue, 11 Feb 2020 22:41:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;andf-mongodb&apos;, &apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13235&quot; title=&quot;Investigate changes in SERVER-44282: Set NUMAPolicy in systemd unit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13235&quot;&gt;&lt;del&gt;DOCS-13235&lt;/del&gt;&lt;/a&gt; add systemd numactl override instructions&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/8ad417eb90963bd6efe5076c28bec50bb2dbdeaf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/8ad417eb90963bd6efe5076c28bec50bb2dbdeaf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2781475" author="xgen-internal-githook" created="Mon, 3 Feb 2020 22:31:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;username&apos;: &apos;andf-mongodb&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13235&quot; title=&quot;Investigate changes in SERVER-44282: Set NUMAPolicy in systemd unit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13235&quot;&gt;&lt;del&gt;DOCS-13235&lt;/del&gt;&lt;/a&gt; add systemd numactl override instructions&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/3d442e3193090d68221ac18bc3cdfab169a86ffc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/3d442e3193090d68221ac18bc3cdfab169a86ffc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2781474" author="xgen-internal-githook" created="Mon, 3 Feb 2020 22:30:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;andf-mongodb&apos;, &apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13235&quot; title=&quot;Investigate changes in SERVER-44282: Set NUMAPolicy in systemd unit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13235&quot;&gt;&lt;del&gt;DOCS-13235&lt;/del&gt;&lt;/a&gt; add systemd numactl override instructions&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/a3811f2674b2619cb2717f8ef977f3055975756f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/a3811f2674b2619cb2717f8ef977f3055975756f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2781473" author="xgen-internal-githook" created="Mon, 3 Feb 2020 22:30:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;username&apos;: &apos;andf-mongodb&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13235&quot; title=&quot;Investigate changes in SERVER-44282: Set NUMAPolicy in systemd unit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13235&quot;&gt;&lt;del&gt;DOCS-13235&lt;/del&gt;&lt;/a&gt; add systemd numactl override instructions&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/8ad417eb90963bd6efe5076c28bec50bb2dbdeaf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/8ad417eb90963bd6efe5076c28bec50bb2dbdeaf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2781472" author="xgen-internal-githook" created="Mon, 3 Feb 2020 22:30:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;andf-mongodb&apos;, &apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13235&quot; title=&quot;Investigate changes in SERVER-44282: Set NUMAPolicy in systemd unit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13235&quot;&gt;&lt;del&gt;DOCS-13235&lt;/del&gt;&lt;/a&gt; add systemd numactl override instructions&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/85dac3ac6ec3ae54c240d0c08231fc87c1d511b0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/85dac3ac6ec3ae54c240d0c08231fc87c1d511b0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2562168" author="mathew.robinson" created="Fri, 22 Nov 2019 16:51:14 +0000"  >&lt;p&gt;Just a note: for non-systemd setups that use SysV init (which is Linuxes older than RHEL 7 generally) we do automatically detect and use numactl if it&apos;s available.&lt;/p&gt;
</comment>
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