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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-6174] Add vm.max_map_count to Production Checklist</title>
                <link>https://jira.mongodb.org/browse/DOCS-6174</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;Each connection requires a thread, and each thread requires (at least) two Linux kernel page &quot;maps&quot; (one for the stack, and one for thread-local storage, I believe).  The sysctl tunable vm.max_map_count is the maximum number of such maps that any process on the system can have.  This means that the maximum number of connections is limited to at most half vm.max_map_count (less in general because of mmapped files and/or other maps that might be needed).&lt;/p&gt;

&lt;p&gt;Thus the sysctl vm.max_map_count should be added to the list of other sysctl tunabled in the Production Checklist, along with a suggested &quot;good starting point&quot; of 65535.  (It might also help to clarify that these are sysctl settings.)&lt;/p&gt;</description>
                <environment></environment>
        <key id="229140">DOCS-6174</key>
            <summary>Add vm.max_map_count to Production Checklist</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="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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="kevin.pulo@mongodb.com">Kevin Pulo</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Sep 2015 14:03:09 +0000</created>
                <updated>Mon, 30 Oct 2023 21:41:45 +0000</updated>
                            <resolved>Fri, 27 Sep 2019 20:33:59 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>1</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="2437221" author="kay.kim@10gen.com" created="Fri, 27 Sep 2019 20:33:59 +0000"  >&lt;p&gt;Just doing housekeeping as we merged the commit.&lt;/p&gt;</comment>
                            <comment id="1828811" author="xgen-internal-githook" created="Fri, 9 Mar 2018 15:32:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;qinhuili@gmail.com&apos;, &apos;name&apos;: &apos;lindaqin&apos;, &apos;username&apos;: &apos;lindaqin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-6174&quot; title=&quot;Add vm.max_map_count to Production Checklist&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-6174&quot;&gt;&lt;del&gt;DOCS-6174&lt;/del&gt;&lt;/a&gt; Add vm.max_map_count recommendation to Production Checklist&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/20ef9c236465e22835cf2e869c5b909d91ab0613&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/20ef9c236465e22835cf2e869c5b909d91ab0613&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1828809" author="xgen-internal-githook" created="Fri, 9 Mar 2018 15:31:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;qinhuili@gmail.com&apos;, &apos;name&apos;: &apos;lindaqin&apos;, &apos;username&apos;: &apos;lindaqin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-6174&quot; title=&quot;Add vm.max_map_count to Production Checklist&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-6174&quot;&gt;&lt;del&gt;DOCS-6174&lt;/del&gt;&lt;/a&gt; Add vm.max_map_count recommendation to Production Checklist&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/6363a786a20da8c522fbfe1e5a0814deba54d5c2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/6363a786a20da8c522fbfe1e5a0814deba54d5c2&lt;/a&gt;&lt;/p&gt;</comment>
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