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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-62797] Invalidate SBE plan cache when any of the query knobs is changed</title>
                <link>https://jira.mongodb.org/browse/SERVER-62797</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Some query knobs may change the semantics of generated plans that are stored in the cache. One way to deal with it would be to encode the values of such query knobs into the plan cache key and only invalidate the cache when any of these knobs is changed. This could be error prone if a new query knob is added in the future but a plan cache key encoding scheme is not updated.&lt;/p&gt;

&lt;p&gt;A safer approach would be to invalidate the cache when any of the query knobs is changed. Given that it&apos;s a relatively rare operation, it shouldn&apos;t cause too much operational disruption. With this approach all query knobs will have to have an &lt;tt&gt;on_update&lt;/tt&gt;&#160;hook to flush the cache.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1967537">SERVER-62797</key>
            <summary>Invalidate SBE plan cache when any of the query knobs is changed</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="anton.korshunov@mongodb.com">Anton Korshunov</reporter>
                        <labels>
                    </labels>
                <created>Thu, 20 Jan 2022 16:10:39 +0000</created>
                <updated>Sun, 29 Oct 2023 21:43:54 +0000</updated>
                            <resolved>Wed, 23 Feb 2022 21:01:38 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4375237" author="xgen-internal-githook" created="Thu, 24 Feb 2022 19:34:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Storch&apos;, &apos;email&apos;: &apos;david.storch@mongodb.com&apos;, &apos;username&apos;: &apos;dstorch&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62797&quot; title=&quot;Invalidate SBE plan cache when any of the query knobs is changed&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62797&quot;&gt;&lt;del&gt;SERVER-62797&lt;/del&gt;&lt;/a&gt; Fix tests which expect disabling SBE to keep the plan cache intact&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ead3b8d93e73f879a8f6d8087c7b527a57594003&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ead3b8d93e73f879a8f6d8087c7b527a57594003&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4372478" author="xgen-internal-githook" created="Wed, 23 Feb 2022 19:43:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Storch&apos;, &apos;email&apos;: &apos;david.storch@mongodb.com&apos;, &apos;username&apos;: &apos;dstorch&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62797&quot; title=&quot;Invalidate SBE plan cache when any of the query knobs is changed&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62797&quot;&gt;&lt;del&gt;SERVER-62797&lt;/del&gt;&lt;/a&gt; Clear SBE plan cache when query knobs are changed&lt;/p&gt;

&lt;p&gt;This necessary for any parameters which could affect the&lt;br/&gt;
plans which are generated and cached by the optimizer. This&lt;br/&gt;
commit also updates the encoding of the SBE plan cache key&lt;br/&gt;
so that it no longer encodes the values of these parameters.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/149e5e01ecadaf3361d31e7ac850977b66db0751&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/149e5e01ecadaf3361d31e7ac850977b66db0751&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1923451">SERVER-61421</issuekey>
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            <issuelink>
            <issuekey id="1988160">SERVER-63885</issuekey>
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