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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-7678] Production Checklist pid_max recommendation not consistent with Unix ulimits recommendations</title>
                <link>https://jira.mongodb.org/browse/DOCS-7678</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;On the &lt;a href=&quot;https://docs.mongodb.org/v3.0/reference/ulimit/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ulimits page&lt;/a&gt; we recommend setting nproc to 64000.&lt;/p&gt;

&lt;p&gt;But in the &lt;a href=&quot;https://docs.mongodb.org/manual/administration/production-checklist/#linux&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Production Checklist for Linux&lt;/a&gt;, we recommend setting &lt;tt&gt;kernel.pid_max&lt;/tt&gt; to only 32768.&lt;/p&gt;

&lt;p&gt;This is inconsistent with the ulimits recommendations (which have been generally accepted as good baseline values, to the point that 64000 is used in the default mongod init scripts these days), because setting nproc to 64000 is useless if the system can only have less than 64000 concurrently running pids.&lt;/p&gt;

&lt;p&gt;Therefore, the Production Checklist should be updated to recommend a &lt;tt&gt;kernel.pid_max&lt;/tt&gt; value of 64000.&lt;/p&gt;</description>
                <environment></environment>
        <key id="280382">DOCS-7678</key>
            <summary>Production Checklist pid_max recommendation not consistent with Unix ulimits recommendations</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="allison.moore@mongodb.com">Allison Reinheimer Moore</assignee>
                                    <reporter username="kevin.pulo@mongodb.com">Kevin Pulo</reporter>
                        <labels>
                    </labels>
                <created>Mon, 18 Apr 2016 08:05:56 +0000</created>
                <updated>Mon, 30 Oct 2023 21:33:30 +0000</updated>
                            <resolved>Mon, 25 Apr 2016 14:00:16 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1245311" author="xgen-internal-githook" created="Mon, 25 Apr 2016 13:59:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;devkev&apos;, u&apos;name&apos;: u&apos;Kevin Pulo&apos;, u&apos;email&apos;: u&apos;kev@pulo.com.au&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-7678&quot; title=&quot;Production Checklist pid_max recommendation not consistent with Unix ulimits recommendations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-7678&quot;&gt;&lt;del&gt;DOCS-7678&lt;/del&gt;&lt;/a&gt; recommend kernel.pid_max of 64000&lt;/p&gt;

&lt;p&gt;This is to match the ulimits nproc recommendation of 64000.&lt;/p&gt;

&lt;p&gt;Signed-off-by: kay &amp;lt;kay.kim@10gen.com&amp;gt;&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/31fccb87bd1194b58d27e908e54225c437112c06&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/31fccb87bd1194b58d27e908e54225c437112c06&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1245310" author="xgen-internal-githook" created="Mon, 25 Apr 2016 13:58:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;devkev&apos;, u&apos;name&apos;: u&apos;Kevin Pulo&apos;, u&apos;email&apos;: u&apos;kev@pulo.com.au&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-7678&quot; title=&quot;Production Checklist pid_max recommendation not consistent with Unix ulimits recommendations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-7678&quot;&gt;&lt;del&gt;DOCS-7678&lt;/del&gt;&lt;/a&gt; recommend kernel.pid_max of 64000&lt;/p&gt;

&lt;p&gt;This is to match the ulimits nproc recommendation of 64000.&lt;/p&gt;

&lt;p&gt;Signed-off-by: kay &amp;lt;kay.kim@10gen.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d9de36c1ab53bca103a2433943b65e9cb8c9d493&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d9de36c1ab53bca103a2433943b65e9cb8c9d493&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1238323" author="kevin.pulo@10gen.com" created="Mon, 18 Apr 2016 08:07:49 +0000"  >&lt;p&gt;Pull request: &lt;a href=&quot;https://github.com/mongodb/docs/pull/2603&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/pull/2603&lt;/a&gt;&lt;/p&gt;</comment>
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