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    <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-15091] Reduce replication lag when primary is overloaded</title>
                <link>https://jira.mongodb.org/browse/SERVER-15091</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Reproducible deterministically. After a bit the load is run on the primary rs.status() will report optimeDate on any of the secondary being far behind the one of the primary. Can be reproduced even with a 3-members replica set all in the same availability zone, in an AWS datacenter.&lt;/p&gt;

&lt;p&gt;Get linkbench from &lt;a href=&quot;https://github.com/dcci/linkbench&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/dcci/linkbench&lt;/a&gt; and run&lt;/p&gt;

&lt;p/&gt;
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&lt;p&gt;Relevant configuration bits into LinkConfigMongodb.properties&lt;/p&gt;
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;loaders = 3&lt;/span&gt;&lt;/pre&gt;
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&lt;p&gt;or higher&lt;/p&gt;</description>
                <environment></environment>
        <key id="155516">SERVER-15091</key>
            <summary>Reduce replication lag when primary is overloaded</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="davide.italiano">Davide Italiano</reporter>
                        <labels>
                            <label>28qa</label>
                    </labels>
                <created>Fri, 29 Aug 2014 15:44:14 +0000</created>
                <updated>Tue, 6 Dec 2022 05:02:07 +0000</updated>
                            <resolved>Thu, 21 Apr 2016 12:12:39 +0000</resolved>
                                                                    <component>Replication</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1242309" author="milkie" created="Thu, 21 Apr 2016 12:12:39 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20779&quot; title=&quot;Oplog performance on primary does not scale&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20779&quot;&gt;&lt;del&gt;SERVER-20779&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="707776" author="milkie" created="Fri, 29 Aug 2014 16:38:58 +0000"  >&lt;p&gt;The work for this ticket will involve investigating the reason why the secondary falls behind so rapidly for this workload, and then explore options to improve this if we deem it valuable.&lt;/p&gt;</comment>
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