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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-15124] Eviction algorithm for bad cached plans needs to be more aggressive</title>
                <link>https://jira.mongodb.org/browse/SERVER-15124</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When we cache a plan, if subsequent queries produce significantly worse performance result than expected, the cached plan should be evicted.&lt;/p&gt;

&lt;p&gt;It&apos;s currently evicted but the eviction strategy is too conservative so if we happen to cache a plan that works well only on a small minority of values we take too long to replace it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="156134">SERVER-15124</key>
            <summary>Eviction algorithm for bad cached plans needs to be more aggressive</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="asya.kamsky@mongodb.com">Asya Kamsky</reporter>
                        <labels>
                    </labels>
                <created>Wed, 3 Sep 2014 14:49:15 +0000</created>
                <updated>Tue, 17 Feb 2015 03:04:07 +0000</updated>
                            <resolved>Tue, 17 Feb 2015 03:04:07 +0000</resolved>
                                    <version>2.6.4</version>
                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="830263" author="david.storch" created="Tue, 17 Feb 2015 03:03:07 +0000"  >&lt;p&gt;Work for this ticket is now 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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