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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-46234] Remove the code for computing hedging delay and add maxTimeMSForHedgedReads serverParameter</title>
                <link>https://jira.mongodb.org/browse/SERVER-46234</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We recently made a few changes to the design. We now always hedge, immediately, and set a maxTimeMS on the hedged read (configurable via maxTimeMSForHedgedReads runtime server parameter). &lt;/p&gt;

&lt;p&gt;Therefore, the code for&#160;staggering support should be removed. That includes the code for the &quot;delay&quot; flag in $readPreference and the code for computing the hedging delay. So the user-facing syntax is now:&#160;&lt;/p&gt;
&lt;p/&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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;    $readPreference: {&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 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;       hedge:&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1158130">SERVER-46234</key>
            <summary>Remove the code for computing hedging delay and add maxTimeMSForHedgedReads serverParameter</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="cheahuychou.mao@mongodb.com">Cheahuychou Mao</assignee>
                                    <reporter username="cheahuychou.mao@mongodb.com">Cheahuychou Mao</reporter>
                        <labels>
                    </labels>
                <created>Tue, 18 Feb 2020 19:25:39 +0000</created>
                <updated>Sun, 29 Oct 2023 22:12:04 +0000</updated>
                            <resolved>Wed, 19 Feb 2020 18:07:02 +0000</resolved>
                                                    <fixVersion>4.3.4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2885099" author="xgen-internal-githook" created="Wed, 19 Feb 2020 18:02:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;cheahuychou&apos;, &apos;name&apos;: &apos;Cheahuychou Mao&apos;, &apos;email&apos;: &apos;cheahuychou.mao@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46234&quot; title=&quot;Remove the code for computing hedging delay and add maxTimeMSForHedgedReads serverParameter&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46234&quot;&gt;&lt;del&gt;SERVER-46234&lt;/del&gt;&lt;/a&gt; Remove the code for computing hedging delay and add maxTimeMSForHedgedReads serverParameter&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/59bd268916dec96d5ff5b4a283481f63776359bf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/59bd268916dec96d5ff5b4a283481f63776359bf&lt;/a&gt;&lt;/p&gt;</comment>
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                            <customfieldvalue>We recently decided to always hedge immediately (never stagger) and set a configurable maxTimeMS on the hedged read. This ticket added support for &amp;quot;maxTimeMSForHedgedReads&amp;quot; runtime server parameter. </customfieldvalue>

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