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    <title>MongoDB Jira</title>
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    <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-72440] Deprioritize collection scans under load</title>
                <link>https://jira.mongodb.org/browse/SERVER-72440</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Under load, user collection scans should be given the lowest scheduling priority over all queries&lt;/p&gt;</description>
                <environment></environment>
        <key id="2221248">SERVER-72440</key>
            <summary>Deprioritize collection scans under load</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="gregory.noma@mongodb.com">Gregory Noma</assignee>
                                    <reporter username="louis.williams@mongodb.com">Louis Williams</reporter>
                        <labels>
                    </labels>
                <created>Thu, 29 Dec 2022 20:45:57 +0000</created>
                <updated>Sun, 29 Oct 2023 21:28:48 +0000</updated>
                            <resolved>Tue, 28 Mar 2023 17:37:04 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="5306660" author="xgen-internal-githook" created="Tue, 28 Mar 2023 17:10:55 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-72440&quot; title=&quot;Deprioritize collection scans under load&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-72440&quot;&gt;&lt;del&gt;SERVER-72440&lt;/del&gt;&lt;/a&gt; Deprioritize unbounded user collection scans&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b609fe88cabcbd8e83142707d5f5697904b8beaf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b609fe88cabcbd8e83142707d5f5697904b8beaf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5247150" author="gregory.noma" created="Fri, 3 Mar 2023 15:48:21 +0000"  >&lt;p&gt;I split out index scans to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74594&quot; title=&quot;Deprioritize unbounded user index scans under load&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74594&quot;&gt;&lt;del&gt;SERVER-74594&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5239773" author="haley.connelly" created="Wed, 1 Mar 2023 12:25:24 +0000"  >&lt;p&gt;Agreed. I think unbounded here is key. &lt;/p&gt;</comment>
                            <comment id="5171050" author="JIRAUSER1263153" created="Mon, 6 Feb 2023 16:21:23 +0000"  >&lt;p&gt;I think this should deprioritize all unbounded scans on collections (both clustered and non-clustered) and indexes.&lt;/p&gt;</comment>
                            <comment id="5171006" author="haley.connelly" created="Mon, 6 Feb 2023 16:12:12 +0000"  >&lt;p&gt;This ticket should make sure that collection scans on clustered indexes are not penalised the same as non-clustered collection scans.&#160;&lt;/p&gt;</comment>
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            <issuelink>
            <issuekey id="2358422">SERVER-77792</issuekey>
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            <issuelink>
            <issuekey id="2363099">SERVER-77931</issuekey>
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            <issuelink>
            <issuekey id="2299794">SERVER-75378</issuekey>
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            <issuelink>
            <issuekey id="2299776">SERVER-75376</issuekey>
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            <issuekey id="2299786">SERVER-75377</issuekey>
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