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    <title>MongoDB Jira</title>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-66435] Always use classic engine for IDhack plans</title>
                <link>https://jira.mongodb.org/browse/SERVER-66435</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As part of the SBE Plan Cache project we tried various optimization to improve the performance of the IDhack queries but were not able to catch up with the classic cache which has a special fast path for generating IDhack plans, which are very simple and very cheap to generate performance wise. To recover the query latency for IDhack plans with the SBE engine turned on as the default we decided to reply on the fall back mechanism and execute these queries with the classic engine. In the future we should revisit this issue and find a proper solution for how to reduce query latency for IDhack queries in SBE.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2045585">SERVER-66435</key>
            <summary>Always use classic engine for IDhack plans</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="anna.wawrzyniak@mongodb.com">Anna Wawrzyniak</assignee>
                                    <reporter username="anton.korshunov@mongodb.com">Anton Korshunov</reporter>
                        <labels>
                            <label>pm2697-m3</label>
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                <created>Thu, 12 May 2022 11:05:13 +0000</created>
                <updated>Sun, 29 Oct 2023 21:38:18 +0000</updated>
                            <resolved>Thu, 20 Oct 2022 17:59:17 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="4898443" author="xgen-internal-githook" created="Wed, 12 Oct 2022 16:15:35 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Anna Wawrzyniak&apos;, &apos;email&apos;: &apos;anna.wawrzyniak@mongodb.com&apos;, &apos;username&apos;: &apos;anna-wawrzyniak&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66435&quot; title=&quot;Always use classic engine for IDhack plans&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66435&quot;&gt;&lt;del&gt;SERVER-66435&lt;/del&gt;&lt;/a&gt; Always use classic engine for IDhack plans&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2e51cfe597385fadd4d7610ada1111b00dccb14f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2e51cfe597385fadd4d7610ada1111b00dccb14f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4547282" author="david.storch" created="Fri, 13 May 2022 13:01:45 +0000"  >&lt;p&gt;I am removing the &quot;6.0 Required&quot; fixVersion due to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66445&quot; title=&quot;Make the classic engine the default execution engine for 6.0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66445&quot;&gt;&lt;del&gt;SERVER-66445&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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