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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-41287] Add count of instances when flow control is engaged</title>
                <link>https://jira.mongodb.org/browse/SERVER-41287</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It will be useful for identifying mongod instances where flow control has been engaged to have cumulative metrics about the number of times flow control has been engaged on a mongod instance since startup, and the cumulative time for which flow control has been engaged. For the purposes of this ticket, flow control being &quot;engaged&quot; means the isLagged metric is 1, i.e., the current majority committed lag is greater than some established threshold percentage of the configured target maximum lag. These new metrics would be based on the isLagged metric, so maybe these could be named&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;isLaggedCount - incremented every time isLagged goes from 0 to 1&lt;/li&gt;
	&lt;li&gt;isLaggedTimeMicros - incremented every time isLagged goes to 0 by the elapsed time since it last went to 1.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="775092">SERVER-41287</key>
            <summary>Add count of instances when flow control is engaged</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="maria.vankeulen@mongodb.com">Maria van Keulen</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                    </labels>
                <created>Thu, 23 May 2019 11:41:39 +0000</created>
                <updated>Sun, 29 Oct 2023 22:20:46 +0000</updated>
                            <resolved>Thu, 6 Jun 2019 17:18:18 +0000</resolved>
                                                    <fixVersion>4.2.0-rc1</fixVersion>
                    <fixVersion>4.3.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="2274278" author="xgen-internal-githook" created="Thu, 6 Jun 2019 17:46:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Maria van Keulen&apos;, &apos;email&apos;: &apos;maria@mongodb.com&apos;, &apos;username&apos;: &apos;mvankeulen94&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-41287&quot; title=&quot;Add count of instances when flow control is engaged&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-41287&quot;&gt;&lt;del&gt;SERVER-41287&lt;/del&gt;&lt;/a&gt; Measure count and duration of periods when isLagged is true&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c27cafcd34190924cd62267fa8b42baf3caa69cb)&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/70de3cf1c8394284cbb89d42df7d1f8672b8b412&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/70de3cf1c8394284cbb89d42df7d1f8672b8b412&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2274061" author="xgen-internal-githook" created="Thu, 6 Jun 2019 16:03:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Maria van Keulen&apos;, &apos;email&apos;: &apos;maria@mongodb.com&apos;, &apos;username&apos;: &apos;mvankeulen94&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-41287&quot; title=&quot;Add count of instances when flow control is engaged&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-41287&quot;&gt;&lt;del&gt;SERVER-41287&lt;/del&gt;&lt;/a&gt; Measure count and duration of periods when isLagged is true&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c27cafcd34190924cd62267fa8b42baf3caa69cb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c27cafcd34190924cd62267fa8b42baf3caa69cb&lt;/a&gt;&lt;/p&gt;</comment>
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