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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-63344] Avoid cloning the SBE tree inside the plan cache mutex</title>
                <link>https://jira.mongodb.org/browse/SERVER-63344</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;ul&gt;
	&lt;li&gt;A cached SBE plan is more expensive to clone than the contents of the classic plan cache.&lt;/li&gt;
	&lt;li&gt;Incurring this expense while holding the lock has been shown to cause additional contention for the mutex in our multi-threaded benchmarks.&lt;/li&gt;
	&lt;li&gt;We can experiment with cloning after dropping the lock by using std::shared_ptr.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1978366">SERVER-63344</key>
            <summary>Avoid cloning the SBE tree inside the plan cache mutex</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="ruoxin.xu@mongodb.com">Ruoxin Xu</assignee>
                                    <reporter username="anton.korshunov@mongodb.com">Anton Korshunov</reporter>
                        <labels>
                    </labels>
                <created>Mon, 7 Feb 2022 14:05:46 +0000</created>
                <updated>Sun, 29 Oct 2023 21:42:59 +0000</updated>
                            <resolved>Mon, 25 Apr 2022 16:27:32 +0000</resolved>
                                                    <fixVersion>6.0.0-rc2</fixVersion>
                    <fixVersion>6.0.0-rc3</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4509256" author="xgen-internal-githook" created="Wed, 27 Apr 2022 11:05:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ruoxin Xu&apos;, &apos;email&apos;: &apos;ruoxin.xu@mongodb.com&apos;, &apos;username&apos;: &apos;RuoxinXu&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63344&quot; title=&quot;Avoid cloning the SBE tree inside the plan cache mutex&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63344&quot;&gt;&lt;del&gt;SERVER-63344&lt;/del&gt;&lt;/a&gt; Avoid cloning the SBE tree inside the plan cache mutex&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 2c0f447cffcf29c906589ca1c17aa9c0739e3e5b)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53bed7ef7717423041b9f3d081fbf449de3dbf56&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53bed7ef7717423041b9f3d081fbf449de3dbf56&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4503676" author="xgen-internal-githook" created="Mon, 25 Apr 2022 14:56:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ruoxin Xu&apos;, &apos;email&apos;: &apos;ruoxin.xu@mongodb.com&apos;, &apos;username&apos;: &apos;RuoxinXu&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63344&quot; title=&quot;Avoid cloning the SBE tree inside the plan cache mutex&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63344&quot;&gt;&lt;del&gt;SERVER-63344&lt;/del&gt;&lt;/a&gt; Avoid cloning the SBE tree inside the plan cache mutex&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2c0f447cffcf29c906589ca1c17aa9c0739e3e5b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2c0f447cffcf29c906589ca1c17aa9c0739e3e5b&lt;/a&gt;&lt;/p&gt;</comment>
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