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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>[COMPASS-7575] Investigate changes in SERVER-84440: Expose the number of replication waiters in serverStatus</title>
                <link>https://jira.mongodb.org/browse/COMPASS-7575</link>
                <project id="13182" key="COMPASS">Compass </project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Original Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;    This adds two metrics to the serverStatus.metrics section:&lt;/p&gt;

&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;repl.waiters.replication exposes how many threads are waiting for a replicated and/or journaled write concern to resolve.  repl.waiters.opTime exposes how many threads are waiting for a local optime only.&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/38a98af97aa04a31f5fda75d9f6c570f12d84026/src/mongo/db/repl/replication_coordinator_impl.cpp#L6045&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;replication waiters list&lt;/a&gt; can grow with the number of operations waiting for write concern. Advancing replication timestamps also requires updating all waiters in this list under a mutex. If the list is long, this can take a long time.&lt;/p&gt;

&lt;p&gt;It would be useful to be able to see how many operations are waiting for replication in this state, which would make it easier to diagnose problems in this area.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2543428">COMPASS-7575</key>
            <summary>Investigate changes in SERVER-84440: Expose the number of replication waiters in serverStatus</summary>
                <type id="10501" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Investigation</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="9">Done</resolution>
                                        <assignee username="rhys.howell@mongodb.com">Rhys Howell</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Thu, 11 Jan 2024 16:19:56 +0000</created>
                <updated>Mon, 22 Jan 2024 22:08:21 +0000</updated>
                            <resolved>Tue, 16 Jan 2024 04:01:38 +0000</resolved>
                                                    <fixVersion>No version</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="6012755" author="rhys.howell" created="Tue, 16 Jan 2024 04:01:38 +0000"  >&lt;p&gt;No devtools product changes needed, we expose the results of serverStatus in the shell, and in Compass we show some information using it in the performance page. We don&apos;t do any parsing that this would impact and it doesn&apos;t sound like we want to add explicit parsing to show this.&lt;/p&gt;</comment>
                            <comment id="6004330" author="dbeng-pm-bot" created="Thu, 11 Jan 2024 16:20:04 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-84440&quot; title=&quot;Expose the number of replication waiters in serverStatus&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-84440&quot;&gt;&lt;del&gt;SERVER-84440&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;br/&gt;
7.3.0-rc0&lt;/p&gt;</comment>
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