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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-15226] Query plan cache should cache query plans that repeatedly tie with winning plan for a given shape</title>
                <link>https://jira.mongodb.org/browse/SERVER-15226</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For a query shape that has never been run before, it is not optimal to cache a plan if it ties with another, because not enough information is available to conclusively rule out either plan.  However, for a query shape that generates two plans that are guaranteed to always tie, it is useless to run a trial for those two plans on every query.  A better solution is to cache an arbitrary plan after it ties N times in a row with the winning plan.&lt;/p&gt;

&lt;p&gt;Related: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15225&quot; title=&quot;CachedPlanStage should execute for trial period and re-plan if query performs poorly&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15225&quot;&gt;&lt;del&gt;SERVER-15225&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</description>
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        <key id="157802">SERVER-15226</key>
            <summary>Query plan cache should cache query plans that repeatedly tie with winning plan for a given shape</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="rassi">J Rassi</reporter>
                        <labels>
                    </labels>
                <created>Thu, 11 Sep 2014 21:48:35 +0000</created>
                <updated>Thu, 25 Jun 2015 18:42:10 +0000</updated>
                            <resolved>Tue, 17 Feb 2015 03:06:54 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="830265" author="david.storch" created="Tue, 17 Feb 2015 03:06:17 +0000"  >&lt;p&gt;This change will be included in work being done under &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15225&quot; title=&quot;CachedPlanStage should execute for trial period and re-plan if query performs poorly&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15225&quot;&gt;&lt;del&gt;SERVER-15225&lt;/del&gt;&lt;/a&gt;. Closing as a duplicate.&lt;/p&gt;</comment>
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