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    <title>MongoDB Jira</title>
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    <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-44296] Report sufficient significant figures of Flow Control locksPerOp in FTDC</title>
                <link>https://jira.mongodb.org/browse/SERVER-44296</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Numerical data in FTDC is stored as 64-bit integers. Flow Control &lt;a href=&quot;https://github.com/mongodb/mongo/blob/29cd14ad598a3594529201fa095cc1fa3dc68e07/src/mongo/db/storage/flow_control.cpp#L200&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;locksPerOp&lt;/tt&gt;&lt;/a&gt; is a floating point value, and is rounded down to 0 in FTDC when its value is &amp;lt; 1. &lt;br/&gt;
&lt;tt&gt;locksPerOp&lt;/tt&gt; is expected to be less than 1 in certain batch write scenarios, so it is important to ensure that it still gets reported as nonzero in these scenarios.&lt;/p&gt;

&lt;p&gt;Some ways to ensure this are:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Report opsPerLock in addition to locksPerOp&lt;/li&gt;
	&lt;li&gt;Multiply locksPerOp by some constant multiple of 10 to ensure sufficient significant figures&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="982564">SERVER-44296</key>
            <summary>Report sufficient significant figures of Flow Control locksPerOp in FTDC</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="13201">Fixed</resolution>
                                        <assignee username="daniel.ernst@mongodb.com">Daniel Ernst</assignee>
                                    <reporter username="maria.vankeulen@mongodb.com">Maria van Keulen</reporter>
                        <labels>
                            <label>groomed</label>
                            <label>neweng</label>
                    </labels>
                <created>Tue, 29 Oct 2019 16:27:57 +0000</created>
                <updated>Sun, 29 Oct 2023 22:15:37 +0000</updated>
                            <resolved>Tue, 10 Dec 2019 20:04:56 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                                    <component>Diagnostics</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2597337" author="xgen-internal-githook" created="Tue, 10 Dec 2019 19:55:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;daniel.ernst@mongodb.com&apos;, &apos;name&apos;: &apos;Daniel Ernst&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44296&quot; title=&quot;Report sufficient significant figures of Flow Control locksPerOp in FTDC&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44296&quot;&gt;&lt;del&gt;SERVER-44296&lt;/del&gt;&lt;/a&gt; Report locksPerKiloOp in Flow Control instead of locksPerOp&lt;/p&gt;

&lt;p&gt;This prevents locksPerOp from being rounded down to 0 in FTDC&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8c00a6ebe6d3f1fbca9b9e0b297e1b130a4e98f9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8c00a6ebe6d3f1fbca9b9e0b297e1b130a4e98f9&lt;/a&gt;&lt;/p&gt;</comment>
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                            <customfieldvalue>The serverStats flowControl.locksPerOp field has been replaced by flowControl.locksPerKiloOp (to ensure sufficient significant figures are reported in FTDC).</customfieldvalue>

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