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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>[SERVER-32041] amend stableCandidates logic from replcoord</title>
                <link>https://jira.mongodb.org/browse/SERVER-32041</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Changing the stableCandidates logic to avoid needing a candidate for every primary write will result in a performance boost.&lt;/p&gt;</description>
                <environment></environment>
        <key id="461420">SERVER-32041</key>
            <summary>amend stableCandidates logic from replcoord</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Mon, 20 Nov 2017 15:33:41 +0000</created>
                <updated>Mon, 30 Oct 2023 23:10:25 +0000</updated>
                            <resolved>Wed, 22 Nov 2017 18:37:14 +0000</resolved>
                                                    <fixVersion>3.6.0-rc6</fixVersion>
                    <fixVersion>3.7.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1735255" author="xgen-internal-githook" created="Mon, 27 Nov 2017 18:36:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Eric Milkie&apos;, &apos;username&apos;: &apos;milkie&apos;, &apos;email&apos;: &apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32041&quot; title=&quot;amend stableCandidates logic from replcoord&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32041&quot;&gt;&lt;del&gt;SERVER-32041&lt;/del&gt;&lt;/a&gt; missed a file when cherry-picking&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1d7d84599ac6a55dac3aec3eba80160a9f4deb1f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1d7d84599ac6a55dac3aec3eba80160a9f4deb1f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1734902" author="xgen-internal-githook" created="Mon, 27 Nov 2017 15:00:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Eric Milkie&apos;, &apos;username&apos;: &apos;milkie&apos;, &apos;email&apos;: &apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32041&quot; title=&quot;amend stableCandidates logic from replcoord&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32041&quot;&gt;&lt;del&gt;SERVER-32041&lt;/del&gt;&lt;/a&gt; more efficient logic in setMyLastAppliedOpTime&lt;/p&gt;

&lt;p&gt;Attempt at making setMyLastAppliedOpTime faster, when triggered by a write on a primary node.&lt;br/&gt;
In addition, be more careful to move the oldest_timestamp forward on one-node replica sets, regardless&lt;br/&gt;
of workload.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 17dfc88333df0be6bb7711efb1885a21a3a697b9)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/093fadbf7ee759b7f8a8f45642c520095b0047d6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/093fadbf7ee759b7f8a8f45642c520095b0047d6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1733154" author="xgen-internal-githook" created="Wed, 22 Nov 2017 18:19:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Eric Milkie&apos;, &apos;username&apos;: &apos;milkie&apos;, &apos;email&apos;: &apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32041&quot; title=&quot;amend stableCandidates logic from replcoord&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32041&quot;&gt;&lt;del&gt;SERVER-32041&lt;/del&gt;&lt;/a&gt; more efficient logic in setMyLastAppliedOpTime&lt;/p&gt;

&lt;p&gt;Attempt at making setMyLastAppliedOpTime faster, when triggered by a write on a primary node.&lt;br/&gt;
In addition, be more careful to move the oldest_timestamp forward on one-node replica sets, regardless&lt;br/&gt;
of workload.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/17dfc88333df0be6bb7711efb1885a21a3a697b9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/17dfc88333df0be6bb7711efb1885a21a3a697b9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1732137" author="sue.loverso" created="Tue, 21 Nov 2017 20:33:31 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=milkie&quot; class=&quot;user-hover&quot; rel=&quot;milkie&quot;&gt;milkie&lt;/a&gt; Here are some FTDC stats from a run with your changes compared to mongodb master (with current WT develop). I ran the TTL workload three times for three minutes each time. Your change results in a 50% degradation compared to master.  Your changes definitely cause a lot more LAS activity compared to mongodb master. In this chart, the run with your changes is on the left and mongodb master is on the right.&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;171492_thumb&quot; href=&quot;https://jira.mongodb.org/secure/attachment/171492/171492_las-ttl.png&quot; title=&quot;las-ttl.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;171492&quot; file-preview-title=&quot;las-ttl.png&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/thumbnail/171492/_thumb_171492.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
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            <issuekey id="414627">SERVER-30577</issuekey>
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