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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-73237] Collect PSI (Pressure Stall Information) in FTDC</title>
                <link>https://jira.mongodb.org/browse/SERVER-73237</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;Recent Kernel versions include &lt;a href=&quot;https://docs.kernel.org/accounting/psi.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;PSI (Pressure Stall Information)&lt;/a&gt; that is very useful to understand the pressure on resources like CPU, Memory and Storage.&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;The psi feature identifies and quantifies the disruptions caused by such resource crunches and the time impact it has on complex workloads or even entire systems.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;We only need to read `/proc/pressure/resource_name` where resource_name can be cpu, memory and storage.&lt;/p&gt;

&lt;p&gt;This information would be really helpful when doing analysis for our customers, since it would give us a good metric on the resources pressure prior to an event that is being investigated. &lt;/p&gt;

&lt;p&gt;In the future, once this is implemented, we could even graph it in our tools and Atlas interface, to understand if the clusters are close to the stall point or even use that information to alert our customers before the stall itself happens.&lt;/p&gt;

&lt;p&gt;Let me know if you have any question.&lt;/p&gt;

&lt;p&gt;Regards.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2241669">SERVER-73237</key>
            <summary>Collect PSI (Pressure Stall Information) in FTDC</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-security">Backlog - Security Team</assignee>
                                    <reporter username="miguel.nieto@mongodb.com">Miguel Angel Nieto</reporter>
                        <labels>
                    </labels>
                <created>Tue, 24 Jan 2023 12:46:53 +0000</created>
                <updated>Mon, 30 Jan 2023 18:10:39 +0000</updated>
                            <resolved>Mon, 30 Jan 2023 18:10:26 +0000</resolved>
                                                                                        <votes>5</votes>
                                    <watches>13</watches>
                                                                                                                <comments>
                            <comment id="5144953" author="miguel.nieto" created="Fri, 27 Jan 2023 01:32:53 +0000"  >&lt;p&gt;Thinking about this, I guess that if we want other tools to use this information (like monitoring agent, or atlas interface) it would need to go to serverStatus.&lt;/p&gt;</comment>
                            <comment id="5143049" author="eric.sedor" created="Thu, 26 Jan 2023 15:42:22 +0000"  >&lt;p&gt;TBD whether this goes in serverStatus or just in one of the FTDC collectors&lt;/p&gt;</comment>
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