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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>[SERVER-47446] Measure cpu time taken by operations</title>
                <link>https://jira.mongodb.org/browse/SERVER-47446</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It would be valuable to measure cpu time consumed by an operation, both as it&apos;s running and rolled up by user (to measure resource consumption by a particular user).  We could potentially expose this via currentOp, via server status metrics or perhaps in a custom agg pipeline (if by user).&lt;/p&gt;

&lt;p&gt;On linux &lt;a href=&quot;http://man7.org/linux/man-pages/man3/pthread_getcpuclockid.3.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;pthread_getcpuclockid()&lt;/a&gt; offers a way to access cpu time consumed by a particular thread relatively easily.  In turn, we could capture time at opCtx creation, then store the delta on each call to opCtx-&amp;gt;checkForInterrupt, then flush the final value into the user level roll up at opCtx destruction.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="1310124">SERVER-47446</key>
            <summary>Measure cpu time taken by operations</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="13201">Fixed</resolution>
                                        <assignee username="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</assignee>
                                    <reporter username="mira.carey@mongodb.com">Mira Carey</reporter>
                        <labels>
                    </labels>
                <created>Thu, 9 Apr 2020 21:58:17 +0000</created>
                <updated>Sun, 29 Oct 2023 22:09:43 +0000</updated>
                            <resolved>Wed, 14 Oct 2020 15:34:15 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>17</watches>
                                                                                                                <comments>
                            <comment id="3444269" author="xgen-internal-githook" created="Wed, 14 Oct 2020 15:30:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47446&quot; title=&quot;Measure cpu time taken by operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47446&quot;&gt;&lt;del&gt;SERVER-47446&lt;/del&gt;&lt;/a&gt; Measure cpu time taken by operations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1f0009a389042c24360509625d50a9e3812658c7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1f0009a389042c24360509625d50a9e3812658c7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3039532" author="bruce.lucas@10gen.com" created="Tue, 14 Apr 2020 19:33:55 +0000"  >&lt;p&gt;Yes to the first sentence. We have gotten better about accounting for wait time (e.g. we have storage wait time now from WT), but by no means all of it is accounted for, so this would help us know whether it was CPU time or some unaccounted-for wait time.&lt;/p&gt;

&lt;p&gt;Regarding your second suggestion, sounds useful for currentOp, but maybe less so for slow query logging.&lt;/p&gt;</comment>
                            <comment id="3037653" author="jason.carey" created="Mon, 13 Apr 2020 20:24:58 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt;,&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;I think it could be helpful to have this in logged slow operations.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;To break out when operations are slow due to blocking vs because they&apos;re actually doing work?  I wonder if a break down about cpu cycles used in the recent past might be a nice addition if that&apos;s a specific use case&lt;/p&gt;</comment>
                            <comment id="3037576" author="bruce.lucas@10gen.com" created="Mon, 13 Apr 2020 19:44:22 +0000"  >&lt;p&gt;I think it could be helpful to have this in logged slow operations.&lt;/p&gt;</comment>
                    </comments>
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                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="444741">SERVER-31541</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1514350">SERVER-51601</issuekey>
        </issuelink>
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