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    <title>MongoDB Jira</title>
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    <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-2371] MongoDB and OS resources</title>
                <link>https://jira.mongodb.org/browse/DOCS-2371</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;Although we do not recommend running multiple active mongod/mongos instances within a single OS, a lot of people are still doing it.&lt;/p&gt;

&lt;p&gt;On of the caveats is that this way you can run into OS resource limitations, that will affect mongod&apos;s in all the unpredictable ways.&lt;/p&gt;

&lt;p&gt;We already documented ulimits, and we need to document kernel limits as well, and I suggest to mention it in Production Notes:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;/proc/sys/kernel/pid_max # the value at which PIDs wrap around&lt;/li&gt;
	&lt;li&gt;/proc/sys/kernel/thread_max # limit on the total number of processes on the system&lt;/li&gt;
	&lt;li&gt;/proc/sys/fs/file-max # Maximum number of open files&lt;/li&gt;
	&lt;li&gt;/proc/sys/fs/file-nr # Will show the number of allocated, unused and max file descriptors. Helpful to estimate the risk of running into file-max limit.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment>UNIX</environment>
        <key id="101663">DOCS-2371</key>
            <summary>MongoDB and OS resources</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="alex.komyagin@mongodb.com">Alexander Komyagin</reporter>
                        <labels>
                    </labels>
                <created>Mon, 9 Dec 2013 16:57:03 +0000</created>
                <updated>Wed, 11 Jan 2017 22:39:27 +0000</updated>
                            <resolved>Wed, 27 Jul 2016 17:19:41 +0000</resolved>
                                                    <fixVersion>01112017-cleanup</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1337920" author="emily.hall" created="Wed, 27 Jul 2016 17:19:41 +0000"  >&lt;p&gt;Closed by Emily Hall for Housekeeping on 7/27/16.&lt;br/&gt;
Please create a new ticket if for prioritization.&lt;/p&gt;

&lt;p&gt;Thank you!&lt;/p&gt;</comment>
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