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    <title>MongoDB Jira</title>
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    <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-32943] Query during background index build can lead to suboptimal cached plan</title>
                <link>https://jira.mongodb.org/browse/SERVER-32943</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Building an index flushes the plan cache.  If a query which could leverage the new index executes while the background build is still in progress, the query will be planned without the ability to consider the new index as a candidate.  This plan can then get cached and there will be no further flushing done as a result of the build process.  Further, the index in the cached plan may not be as selective as the newly created one, therefore it may be hard to evict the old plan without manual intervention.&lt;/p&gt;</description>
                <environment></environment>
        <key id="488220">SERVER-32943</key>
            <summary>Query during background index build can lead to suboptimal cached plan</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="13201">Fixed</resolution>
                                        <assignee username="james.wahlin@mongodb.com">James Wahlin</assignee>
                                    <reporter username="christopher.harris@mongodb.com">Chris Harris</reporter>
                        <labels>
                    </labels>
                <created>Sat, 27 Jan 2018 06:26:30 +0000</created>
                <updated>Sun, 29 Oct 2023 22:35:25 +0000</updated>
                            <resolved>Wed, 9 May 2018 15:11:14 +0000</resolved>
                                                    <fixVersion>3.6.9</fixVersion>
                    <fixVersion>4.0.0-rc0</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>14</watches>
                                                                                                                <comments>
                            <comment id="2009736" author="xgen-internal-githook" created="Thu, 20 Sep 2018 19:53:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;James Wahlin&apos;, &apos;email&apos;: &apos;james@mongodb.com&apos;, &apos;username&apos;: &apos;jameswahlin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32943&quot; title=&quot;Query during background index build can lead to suboptimal cached plan&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32943&quot;&gt;&lt;del&gt;SERVER-32943&lt;/del&gt;&lt;/a&gt; Query during background index build can lead to suboptimal cached plan&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 2f20acfd0d462e7f6c1c1c59bd562c883f1db55d)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ac77dda1614b446e3772bd19cdee42735f2f0d7c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ac77dda1614b446e3772bd19cdee42735f2f0d7c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1887086" author="xgen-internal-githook" created="Wed, 9 May 2018 15:09:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;james@mongodb.com&apos;, &apos;name&apos;: &apos;James Wahlin&apos;, &apos;username&apos;: &apos;jameswahlin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32943&quot; title=&quot;Query during background index build can lead to suboptimal cached plan&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32943&quot;&gt;&lt;del&gt;SERVER-32943&lt;/del&gt;&lt;/a&gt; Query during background index build can lead to suboptimal cached plan&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2f20acfd0d462e7f6c1c1c59bd562c883f1db55d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2f20acfd0d462e7f6c1c1c59bd562c883f1db55d&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="939757">SERVER-43624</issuekey>
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                                        <issuelink>
            <issuekey id="538772">SERVER-34830</issuekey>
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            <issuekey id="475498">SERVER-32452</issuekey>
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