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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-17418] After disabling transparent huge pages via rc.local mongodb shell warns about THP being enabled</title>
                <link>https://jira.mongodb.org/browse/SERVER-17418</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When disabling transparent huge pages on server start up via /etc/rc.local warnings about THP being enabled are presented when starting the mongo shell and in the mongodb.log.  &lt;/p&gt;

&lt;p&gt;Because commands in rc.local are executed at the end of the multiuser run level which mongodb starts the mongo server reports that transparent huge pages are still enabled even though they had been disabled.&lt;/p&gt;

&lt;p&gt;$ tail /var/log/mongodb/mongodb.log&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;
	&lt;ul&gt;
		&lt;li&gt;
		&lt;ul&gt;
			&lt;li&gt;
			&lt;ul&gt;
				&lt;li&gt;
				&lt;ul&gt;
					&lt;li&gt;SERVER RESTARTED *****&lt;br/&gt;
...&lt;br/&gt;
2015-02-27T13:32:22.946-0800 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is &apos;always&apos;.&lt;br/&gt;
2015-02-27T13:32:22.946-0800 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; **        We suggest setting it to &apos;never&apos;&lt;br/&gt;
2015-02-27T13:32:22.946-0800 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; &lt;br/&gt;
2015-02-27T13:32:22.946-0800 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is &apos;always&apos;.&lt;br/&gt;
2015-02-27T13:32:22.946-0800 I CONTROL  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; **        We suggest setting it to &apos;never&apos;&lt;/li&gt;
				&lt;/ul&gt;
				&lt;/li&gt;
			&lt;/ul&gt;
			&lt;/li&gt;
		&lt;/ul&gt;
		&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;$ cat /sys/kernel/mm/transparent_hugepage/enabled&lt;br/&gt;
always madvise &lt;span class=&quot;error&quot;&gt;&amp;#91;never&amp;#93;&lt;/span&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="186693">SERVER-17418</key>
            <summary>After disabling transparent huge pages via rc.local mongodb shell warns about THP being enabled</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="5" iconUrl="https://jira.mongodb.org/images/icons/priorities/trivial.svg">Trivial - P5</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="9">Done</resolution>
                                        <assignee username="ramon.fernandez@mongodb.com">Ramon Fernandez Marina</assignee>
                                    <reporter username="Pablosquared">Paul Gaynor [X]</reporter>
                        <labels>
                    </labels>
                <created>Fri, 27 Feb 2015 21:51:26 +0000</created>
                <updated>Tue, 16 Jun 2015 10:23:33 +0000</updated>
                            <resolved>Fri, 27 Feb 2015 22:46:04 +0000</resolved>
                                                                    <component>Admin</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="839500" author="ramon.fernandez" created="Fri, 27 Feb 2015 22:45:03 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=Pablosquared&quot; class=&quot;user-hover&quot; rel=&quot;Pablosquared&quot;&gt;Pablosquared&lt;/a&gt;, from your description it seems that when &lt;tt&gt;mongod&lt;/tt&gt; starts THP are &lt;b&gt;still enabled&lt;/b&gt;, hence the warning &amp;#8211; &lt;tt&gt;mongod&lt;/tt&gt; can&apos;t possibly know that &lt;tt&gt;rc.local&lt;/tt&gt; will disable them later. The solution is to disable THP &lt;b&gt;before&lt;/b&gt; &lt;tt&gt;mongod&lt;/tt&gt; is run.&lt;/p&gt;

&lt;p&gt;Note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion like this one please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;, where your question will reach a larger audience. A question like this involving more discussion would be best posted on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="188473">SERVER-17522</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="201455">DOCS-5330</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="95193">DOCS-2131</issuekey>
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