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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-24133] Memory policy update from the mongod process</title>
                <link>https://jira.mongodb.org/browse/SERVER-24133</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As per the &lt;a href=&quot;https://www.kernel.org/doc/Documentation/vm/numa_memory_policy.txt&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Linux kernel documentation&lt;/a&gt;, there are three different system calls to control the memory policy. These calls always affect only the calling task, the calling task&apos;s address space, or some shared object mapped into the calling task&apos;s address space.&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;a href=&quot;http://linux.die.net/man/2/set_mempolicy&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;set_mempolicy&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;http://linux.die.net/man/2/get_mempolicy&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;get_mempolicy&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;http://linux.die.net/man/2/mbind&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mbind&lt;/a&gt;&lt;/li&gt;
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&lt;p&gt;The &lt;tt&gt;MPOL_INTERLEAVED&lt;/tt&gt; mode specifies that page allocations be interleaved, on a page granularity, across the nodes specified in the policy. As mentioned before, those calls always affect only the calling task, so there is no way to invoke them outside of the specific process.&lt;/p&gt;

&lt;p&gt;The &lt;tt&gt;numactl&lt;/tt&gt; tool is packaged with the run-time version of the library containing the memory policy system call wrappers. This tool is convenient and flexible in order to run &lt;tt&gt;mongod&lt;/tt&gt; and modify the memory policy for the process.&lt;/p&gt;

&lt;p&gt;However, is there any chance for &lt;tt&gt;mongod&lt;/tt&gt; to use the API calls to set the policy without requiring &lt;tt&gt;numactl&lt;/tt&gt;? It will be easier for the users if this can be done in a transparent way.&lt;/p&gt;</description>
                <environment></environment>
        <key id="286243">SERVER-24133</key>
            <summary>Memory policy update from the mongod process</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="irwin.dolobowsky@mongodb.com">Irwin Dolobowsky</assignee>
                                    <reporter username="ricardo.lorenzo">Ricardo Lorenzo</reporter>
                        <labels>
                    </labels>
                <created>Thu, 12 May 2016 08:41:42 +0000</created>
                <updated>Wed, 2 Aug 2023 21:20:54 +0000</updated>
                            <resolved>Wed, 2 Aug 2023 21:20:54 +0000</resolved>
                                                                    <component>Admin</component>
                    <component>Internal Code</component>
                                        <votes>3</votes>
                                    <watches>14</watches>
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