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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>[DOCS-12784] Docs for SERVER-41287: Add count of instances when flow control is engaged</title>
                <link>https://jira.mongodb.org/browse/DOCS-12784</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;blockquote&gt;
&lt;h3&gt;&lt;a name=&quot;Description%3A&quot;&gt;&lt;/a&gt;Description: &lt;/h3&gt;

&lt;p&gt;This ticket adds fields to serverStatus output.&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;EngineeringTicketDescription%3A&quot;&gt;&lt;/a&gt;Engineering Ticket Description:&lt;/h3&gt;

&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;
&lt;/blockquote&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="793826">DOCS-12784</key>
            <summary>Docs for SERVER-41287: 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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                            <label>docs-4.2-flow-control</label>
                            <label>docs-4.2-replication</label>
                    </labels>
                <created>Fri, 7 Jun 2019 20:09:10 +0000</created>
                <updated>Mon, 13 Nov 2023 18:20:00 +0000</updated>
                            <resolved>Fri, 2 Aug 2019 17:01:47 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                    <fixVersion>4.2.0-rc1</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2356320" author="xgen-internal-githook" created="Fri, 2 Aug 2019 17:01:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kay Kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12670&quot; title=&quot;Document Flow Control feature&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12670&quot;&gt;&lt;del&gt;DOCS-12670&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12630&quot; title=&quot;Docs for SERVER-39848: Determine and implement Flow Control serverStatus metrics&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12630&quot;&gt;&lt;del&gt;DOCS-12630&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12784&quot; title=&quot;Docs for SERVER-41287: Add count of instances when flow control is engaged&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12784&quot;&gt;&lt;del&gt;DOCS-12784&lt;/del&gt;&lt;/a&gt;: Flow control&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/f98659560e76699a43bb2e229a6e82723121152d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/f98659560e76699a43bb2e229a6e82723121152d&lt;/a&gt;&lt;/p&gt;</comment>
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