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    <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-18763] Use get_mempolicy() or /proc/zoneinfo instead of /sys/devices/system/node/node1 to determine if NUMA is present</title>
                <link>https://jira.mongodb.org/browse/SERVER-18763</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When the NUMA startup warning tries to determine if the host has more than 1 NUMA node, it looks for the existence of &lt;tt&gt;/sys/devices/system/node/node1&lt;/tt&gt;.  However, this is needlessly fragile because &lt;tt&gt;/sys&lt;/tt&gt; might&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;not be mounted,&lt;/li&gt;
	&lt;li&gt;be mounted elsewhere,&lt;/li&gt;
	&lt;li&gt;be missing certain hardware info (eg. NUMA nodes), or&lt;/li&gt;
	&lt;li&gt;have restricted ownership or permissions (or be subject to other MAC restrictions like SELinux or AppArmor).&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;Better approaches to determine the number of NUMA nodes are to either use the &lt;tt&gt;get_mempolicy()&lt;/tt&gt; Linux syscall, or as a fallback, look for a line starting with &quot;&lt;tt&gt;Node 1&lt;/tt&gt;&quot; in &lt;tt&gt;/proc/zoneinfo&lt;/tt&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="207637">SERVER-18763</key>
            <summary>Use get_mempolicy() or /proc/zoneinfo instead of /sys/devices/system/node/node1 to determine if NUMA is present</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-platform">DO NOT USE - Backlog - Platform Team</assignee>
                                    <reporter username="kevin.pulo@mongodb.com">Kevin Pulo</reporter>
                        <labels>
                            <label>move-sa</label>
                            <label>platforms-re-triaged</label>
                    </labels>
                <created>Mon, 1 Jun 2015 10:03:10 +0000</created>
                <updated>Tue, 10 May 2022 21:25:07 +0000</updated>
                                                                            <component>Admin</component>
                                        <votes>1</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="4539809" author="steven.vannelli" created="Tue, 10 May 2022 21:25:07 +0000"  >&lt;p&gt;Moving this ticket to the Backlog and removing the &quot;Backlog&quot; fixVersion as per our latest policy for using fixVersions. &lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="87408">SERVER-10623</issuekey>
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            <issuelink>
            <issuekey id="107439">SERVER-12464</issuekey>
        </issuelink>
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            <issuekey id="286243">SERVER-24133</issuekey>
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