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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[DOCS-10489] Add additional recommendations around running multiple mongod processes on a single host</title>
                <link>https://jira.mongodb.org/browse/DOCS-10489</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;The MongoDB Production Notes has a section entitled &apos;&lt;a href=&quot;https://docs.mongodb.com/manual/administration/production-notes/#allocate-sufficient-ram-and-cpu&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Allocate Sufficient RAM and CPU&lt;/a&gt;&apos; which talks about the considerations for deploying &lt;tt&gt;mongod&lt;/tt&gt; nodes using either the MMAPv1 or WiredTiger storage engine.&lt;/p&gt;

&lt;p&gt;There is a small paragraph in the WiredTiger section which talks about the considerations when running multiple WiredTiger instances on a single host, but there are no such recommendations for MMAPv1. Nor are there any recommendations around running both an MMAPv1 based &lt;tt&gt;mongod&lt;/tt&gt; process and a WiredTiger based &lt;tt&gt;mongod&lt;/tt&gt; process on the same host.&lt;/p&gt;

&lt;p&gt;It would be beneficial in both cases to suggest that these are not recommended configurations, i.e. it is not recommended to run multiple MMAPv1 based &lt;tt&gt;mongod&lt;/tt&gt; processes on a single host and you should definitely not run a mixed environment (MMAPv1 based &lt;tt&gt;mongod&lt;/tt&gt; processes and WiredTiger based &lt;tt&gt;mongod&lt;/tt&gt; processes) on a single host &lt;em&gt;unless&lt;/em&gt; there are explicit controls in place (e.g. cgroups, containers and/or virtual machines to ensure complete resource isolation).&lt;/p&gt;</description>
                <environment></environment>
        <key id="400613">DOCS-10489</key>
            <summary>Add additional recommendations around running multiple mongod processes on a single host</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="ronan.bohan@mongodb.com">Ronan Bohan</reporter>
                        <labels>
                    </labels>
                <created>Wed, 5 Jul 2017 12:36:58 +0000</created>
                <updated>Mon, 30 Oct 2023 21:09:25 +0000</updated>
                                                            <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>3</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="4940702" author="edu.bot" created="Mon, 31 Oct 2022 16:09:40 +0000"  >&lt;p&gt;Hello! This ticket has been closed due to inactivity. If you believe this ticket is still important, please reopen it and leave a comment to explain why. Thank you!&lt;/p&gt;</comment>
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