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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-47258] Refactor the WiredTigerOplogManager</title>
                <link>https://jira.mongodb.org/browse/SERVER-47258</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Remove the small delay to update the oplogReadTimestamp when there are no callers (waitForAllEarlierOplogWritesToBeVisible) awaiting updates to the oplogReadTimestamp. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/616780c320e7da17e7d1425cea5b13a56cccfd4d/src/mongo/db/storage/wiredtiger/wiredtiger_oplog_manager.cpp#L181-L203&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This&lt;/a&gt; code is extra logic added in order not to overwhelm the system with too frequent I/O when the thread used to call waitUntilDurable() (flush to disk). The waiting logic was added in &lt;a href=&quot;https://github.com/mongodb/mongo/commit/a5656bc506fcdfe36d44cfb3c17969cbe35695c0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this commit&lt;/a&gt; in v3.6, to handle the waitUntilDurable() call also added in v3.6. There is no longer a waitUntilDurable() call in the code since the Replicate Before Journaling project completed.&lt;/p&gt;

&lt;p&gt;We also need to rename the functions, etc., to better reflect that journal flushing no longer happens.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;UPDATE&lt;/b&gt;:&lt;/p&gt;

&lt;p&gt;This is going to be a purely non-functional change now. The performance results were not good removing the delay. See the CR for details.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1300834">SERVER-47258</key>
            <summary>Refactor the WiredTigerOplogManager</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="13201">Fixed</resolution>
                                        <assignee username="dianna.hohensee@mongodb.com">Dianna Hohensee</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Wed, 1 Apr 2020 21:16:43 +0000</created>
                <updated>Sun, 29 Oct 2023 22:10:03 +0000</updated>
                            <resolved>Wed, 8 Apr 2020 23:38:36 +0000</resolved>
                                                    <fixVersion>4.4.0-rc8</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3144100" author="dianna.hohensee" created="Fri, 29 May 2020 18:57:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;email&apos;: &apos;dianna.hohensee@mongodb.com&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47258&quot; title=&quot;Refactor the WiredTigerOplogManager&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47258&quot;&gt;&lt;del&gt;SERVER-47258&lt;/del&gt;&lt;/a&gt; Refactor the WiredTigerOplogManager: improve names, comments, logs.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit aa30f3747a32237e5dbb187c5bedd19108ad2f4e)&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48240&quot; title=&quot;Undo unintentional functional change to WiredTigerOplogManager that causes a performance degradation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48240&quot;&gt;&lt;del&gt;SERVER-48240&lt;/del&gt;&lt;/a&gt; Undo accidental functional change to WiredTigerOplogManager that causes a performance degradation&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 26cff8f010cac091c17d7373f8ead0e8c73ee6f7)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7d075fc7fddfadaff15e4f98fd8ded80b0035fec&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7d075fc7fddfadaff15e4f98fd8ded80b0035fec&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3032214" author="xgen-internal-githook" created="Wed, 8 Apr 2020 23:49:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;email&apos;: &apos;dianna.hohensee@mongodb.com&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47258&quot; title=&quot;Refactor the WiredTigerOplogManager&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47258&quot;&gt;&lt;del&gt;SERVER-47258&lt;/del&gt;&lt;/a&gt; Refactor the WiredTigerOplogManager: improve names, comments, logs.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/aa30f3747a32237e5dbb187c5bedd19108ad2f4e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/aa30f3747a32237e5dbb187c5bedd19108ad2f4e&lt;/a&gt;&lt;/p&gt;</comment>
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